6.0 Blue Spring Kit Upgrade - Fuel Injection Pressure Regulator Kit - Fits for 2003 2004 2005 2006 2007 F250, F350, F450, F550 Replaces# 3C3Z-9T517-AG, 3C3Z9T517AG

1 offer from $1299
6.0 Blue Spring Kit Upgrade,Ford Blue Spring Kit 6.0 Powerstroke Fits 2003 2004 2005 2006 2007 F250, F350, F450, F550- Replaces 3C3Z-9T517-AG Fuel Pressure Regulator

1 offer from $2399
6.0 Blue Spring Kit Upgrade Powerstroke Fuel Pressure Regulator Kit Compatible with 2003 2004 2005 2006 2007 F250, F350, F450, F550 Replaces # 3C3Z-9T517-AG 3C3Z9T517AG

Amazon's Choice

1 offer from $1999
6.0 Blue Spring Kit Upgrade Compatible with Ford fuel pressure Regulator Kit Ford Blue Spring Kit 6.0 Powerstroke Fits 2003/2004/2005/2006/2007 F250/F350/ F450/ F550 Replaces 3C3Z-9T517-AG,3C3Z9T517AG

1 offer from $1349
Misakomo 3C3Z-9T517-AG 6.0L Blue Spring Kit with Billet Spring Housing, Fuel Regulator Kit Compatible with 2003-2007 Ford Excursion F250 F350 F450 F550 Super Duty, Blue Spring Kit 6.0 Powerstroke

1 offer from $2499
6.0 Blue Spring Kit Upgrade,Fuel Injection Pressure Regulator Kit Fits for 2003 2004 2005 2006 2007 F250, F350, F450, F550 Replaces# 3C3Z-9T517-AG, 3C3Z9T517AG

1 offer from $1999

WARNING: California’s Proposition 65

Product Description

The blue spring upgrade kit provides many benefit to your Ford 6.0 including increased injector life, smoother power delivery, and increased drive-ability. The Blue Spring Upgrade Kit installs on the 6.0 fuel pressure regulator housing in the engine bay. Access the link included with your Blue Spring Kit and follow the step-by-step installation video.

Fits The Following 6.0 Powerstroke Vehicles:

2003-2007 Ford F-250
2003-2007 Ford F-350
2003-2007 Ford F-450
2003-2007 Ford F-550
2003-2007 Ford Excursion

Replaces Ford Part Number: 3C3Z-9T517-AG

Complete Kit With Everything You Need For An Easy Installation

Includes:

Rubber O-ring seals x4
Orifice seals x3
Screws x4
Upgraded blue spring
Fuel pressure regulator housing
Link to a detailed installation video

Perfect For Stock or Modified Trucks

Upgrade your vehicle and enjoy these benefits:

Increased fuel pressure
Improved driveability
Increased injector life
Smoother power delivery

Experience the AA Ignition Difference!

ASE Certified Technicians

Installing parts on you vehicle can be difficult and we understand. That's why we have certified technicians on staff to assist you with installation or even properly diagnosing your car. Our technicians will even provide the factory repair manual to make installation easier for you.

Strict Quality Control

All of our parts undergo strict quality control not just before shipping but throughout the production process. During each step of production multiple quality control checks are performed to insure each and every part lasts for years to come. Satisfaction Guaranteed.

An American Business

AA Ignition is a division of GWA Auto Parts and we are proud to be an American Small Business. Located in sunny South Florida and founded by long time car enthusiasts, AA Ignition takes pride in providing quality products at an exceptional value.

This is a compatible replacement part manufactured by AA Ignition. This blue spring kit is NOT a genuine Ford part. Ford and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this blue spring kit fits.

	Blue Spring Upgrade Kit	STC HPOP fitting update kit	Glow Plug Harness Kit
			Buying Options
Customer Reviews	1,343	337	1,082
Price	$22.49	$33.99	— no data
SKU	GWA109	GWA120	AA127
Brand	AA Ignition	AA Ignition	AA Ignition

Product information

Technical Details

Name: Amazon.com: 6.0 Blue Spring Kit Upgrade - Fuel Regulator Kit - Compatible with Ford Trucks - Blue Spring Kit 6.0 Powerstroke F250, F350, F450, F550 2003, 2004, 2005, 2006, 2007-Replaces 3C3Z-9T517-AG, 3C3Z9T517AG : Automotive
Rating: 4.3 (1343 reviews)

Manufacturer	‎AA Ignition
Brand	‎AA Ignition
Item Weight	‎4.2 ounces
Package Dimensions	‎3.9 x 3.58 x 2.32 inches
Item model number	‎5841847321
Is Discontinued By Manufacturer	‎No
Manufacturer Part Number	‎GWA109
OEM Part Number	‎3C3Z-9T517-AG, 3C3Z9T517AG

Additional Information

ASIN	B071RS785S
Customer Reviews	1,343 ratings 4.3 out of 5 stars
Best Sellers Rank	#533,608 in Automotive (See Top 100 in Automotive) #330 in Automotive Replacement Engine Oil Pumps
Date First Available	May 2, 2017

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

Product Warranty: For warranty information about this product, please click here

Feedback

Would you like to tell us about a lower price?

Compare with similar items

	This Item 6.0 Blue Spring Kit Upgrade - Fuel Regulator Kit - Compatible with Ford Trucks - Blue Spring Kit 6.0 Powerstroke F250, F350, F450, F550 2003, 2004, 2005, 2006, 2007-Replaces 3C3Z-9T517-AG, 3C3Z9T517AG	Recommendations 6.0 Blue Spring Kit Upgrade Compatible with Ford fuel pressure Regulator Kit Ford Blue Spring Kit 6.0 Powerstroke Fits 2003/2004/2005/2006/2007 F250/F350/ F450/ F550 Replaces 3C3Z-9T517-AG,3C3Z9T517AG	Vexillaris 3C3Z-9T517-AG Fuel Pressure Regulator Kit,6.0 Blue Spring Kit Upgrade,Ford Blue Spring Kit 6.0 Powerstroke For 2003 2004 2005 2006 2007 F250, F350, F450, F550	6.0 Blue Spring Kit Upgrade,Fuel Injection Pressure Regulator Kit Fits for 2003 2004 2005 2006 2007 F250, F350, F450, F550 Replaces# 3C3Z-9T517-AG, 3C3Z9T517AG	Fuel Banjo Bolt Ultra High Flow Upgrade Kit for Ford 6.0L & 6.4L fit for Powerstroke F250, F350, 450, F550	6.0 Blue Spring Kit Upgrade Powerstroke Fuel Pressure Regulator Kit Compatible with 2003 2004 2005 2006 2007 F250, F350, F450, F550 Replaces # 3C3Z-9T517-AG 3C3Z9T517AG
	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment	Try again! Details Added to Cart spCSRF_Treatment
Price	$22.49	-10% $13.49 Typical: $14.99	$18.48	$19.99	$14.30	$19.99
Delivery	Get it as soon as Friday, May 2	Get it as soon as Friday, May 2	Get it as soon as Sunday, May 11	Get it as soon as Friday, May 2	Get it as soon as Friday, May 2	Get it as soon as Friday, May 2
Customer Ratings	4.31,343	4.249	5.02	3.37	4.373	4.2322
Sold By	REFURB 360	wzyongle	Good goods abound	Achilioson Direct	Bird's wings	Auto Parts Outlets

Brief content visible, double tap to read full content.

Full content visible, double tap to read brief content.

Upload your video

Customer reviews

1,343 global ratings

How customer reviews and ratings work

Review this product

Write a customer review

Customers say

Customers find the fuel regulator kit easy to install, taking less than 30 minutes, with a step-by-step video guide. The product functions well and offers good value for money, with one customer noting it's a worthwhile investment for their 6.0 Ford diesel engine. However, the quality receives mixed feedback, with some praising its heavy-duty construction while others report poorly cast aluminum parts. Moreover, the fit, thread quality, and fuel pressure show mixed results - while some report perfect installation and increased pressure to over 80psi, others experience leaks and stripped threads.

AI-generated from the text of customer reviews

Select to learn more

Ease of installation Functionality Value for money Quality Fit Fuel pressure Leakage Thread quality

62 customers mention "Ease of installation"59 positive3 negative

Customers find the fuel regulator kit easy to install, taking less than 30 minutes, with step-by-step video instructions making the process straightforward.

"...Very easy to do. I had the entire housing off when I did it, and it went fast...." Read more

"Arrived quickly and bolted right on. Solved my low fuel pressure issue. Shop wanted $250 replace my pressure regulator so I told them no, I'll do it...." Read more

"The kit was straight forward and installation went well. All required parts were included...." Read more

"...Very quick to install but instructions would’ve been nice (thanks YouTube) and would’ve made it a lot quicker to install" Read more

54 customers mention "Functionality"49 positive5 negative

Customers are satisfied with the functionality of the fuel regulator kit, reporting that their trucks run fine after installation, with one customer noting that the spring works well even after several months of use.

"...Works as it should." Read more

"I used the guts (gasket, spring, etc) and all works perfect. Kept the housing just in case I need to use it in the future...." Read more

"Worked Fine as described" Read more

"...So far the kit is functioning as intended. Very easy to install!" Read more

48 customers mention "Value for money"35 positive13 negative

Customers find the fuel regulator kit to be good value for money, offering great quality at an affordable price.

"...I am very pleased with the product and cost of the product." Read more

"...first the goods. This is definitely worth doiong if you have a bit of a cold start problem...." Read more

"...the correct one is really difficult as they are not common do much more expensive...." Read more

"...It is preferred by Amazon and has decent reviews. Also decently priced...." Read more

91 customers mention "Quality"50 positive41 negative

Customers have mixed opinions about the quality of the fuel regulator kit, with some finding it heavy-duty while others report it being poorly manufactured, particularly noting issues with the torx bolts.

"Good rebuild/ upgrade kit. But any review telling you that you’ll feel a power difference is BS...." Read more

"...I think the bolts could have been better quality because you need to have them on the housing pretty snug and they wanted to try and strip on me,..." Read more

"All I really bought this for was the spring. Spring did seem to be more heavy-duty...." Read more

"...The replacement metal housing was subpar with the threads nearly impossible to screw in properly (bad machining)...." Read more

61 customers mention "Fit"38 positive23 negative

Customers have mixed experiences with how the fuel regulator kit fits, with some reporting it aligns perfectly and works well with gaskets and springs, while others find it doesn't match their needs.

"...Although I haven’t noticed a power increase, everything fit as should. I am very pleased with the product and cost of the product." Read more

"...So I had to use the same housing it had. But gaskets and spring fit/work good." Read more

"...looking to be not smooth and showing signs of deterioration and fitting issues. I still used it and it did not seem to leak...." Read more

"...Big mistake on my part. I would first like to say this kit fit perfectly except for one of the o rings...." Read more

43 customers mention "Fuel pressure"22 positive21 negative

Customers report mixed results with the fuel pressure kit, with some achieving over 80psi and pegging out at 100psi, while others experience low pressure for 50 miles.

"...Consistent increased fuel pressure" Read more

"...Also decently priced. After installation my fuel pressure was much less than original and below a safe threshold holding fuel pressure at 40 psi at..." Read more

"...This is a nice stiff spring and is providing great fuel pressure. Only 4 stars for two reasons, cover and bolts were not OEM fit up...." Read more

"...This was locking the relief closed not allowing it to move and maxing out my pump...." Read more

39 customers mention "Leakage"19 positive20 negative

Customers have mixed experiences with the fuel regulator kit's sealing performance, with some reporting it solves leaks while others mention issues with the plunger seal failing.

"...I have no current leaks. Although I haven’t noticed a power increase, everything fit as should...." Read more

"...Only doing it this time because the keyhole gasket started leaking. The problem is with the cover plate...." Read more

"Old housing was leaking diesel, installed the new parts and it no longer leaks...." Read more

"...After removing the fuel regulator plunger I saw the seal on the plunger had failed. (See pic) Motorcraft parts or nothing for me!..." Read more

45 customers mention "Thread quality"0 positive45 negative

Customers report multiple issues with the threads of the fuel regulator kit, including stripped threads, rough surfaces, and bad housing connections.

"...first..... on the new cover piece, the threads on the return pipe hole are rough they required so much turning in and out of the pipe fitting to fit..." Read more

"...The replacement metal housing was subpar with the threads nearly impossible to screw in properly (bad machining)...." Read more

"...Along with this the threads we're not done properly so I couldn't even thread to the fuel line fitting into it...." Read more

"...The housing thread is not smooth for the pipe to be screwed on it. So I had to use the same housing it had. But gaskets and spring fit/work good." Read more

Reviews with images

See all photos

Top reviews from the United States

There was a problem filtering reviews. Please reload the page.

Amazon Customer
Works great, installed without major issues
Reviewed in the United States on January 26, 2019
Verified Purchase

Everything worked great to me except the bolts. Granted, if you are replacing just the regulator you will probably have no issue with these bolts. I replaced my entire housing and regulator. This being said, the housing I received came without thereads, so I used a slightly thicker type of screw. The type I used is self tapping with a 5/16 head. If you are replacing the housing along with the regulator I recommend doing this or tapping out the 4 hole slots to fit the bolts given. I have no current leaks. Although I haven’t noticed a power increase, everything fit as should. I am very pleased with the product and cost of the product.

Read more

Helpful

Report
D.L. Bush
Great kit, easy install but some reviews are misleading
Reviewed in the United States on October 16, 2018
Verified Purchase
Good rebuild/ upgrade kit. But any review telling you that you’ll feel a power difference is BS. I believe it’s a good kit and will help prolong injector life but you’re not gonna feel a difference in power or boost. Still a great kit, I used it to repair a leaking O ring and it did exactly that.

Read more

One person found this helpful

Helpful

Report
Randy Nichols
Doesn’t leak
Reviewed in the United States on June 23, 2024
Verified Purchase
Old housing was leaking diesel, installed the new parts and it no longer leaks. I used the new cast part as well because my old one was leaking where the nipple screws in. Truck feels more powerful and responsive paired with a new STC as well.

Read more

Randy Nichols

Doesn’t leak

Reviewed in the United States on June 23, 2024
Old housing was leaking diesel, installed the new parts and it no longer leaks. I used the new cast part as well because my old one was leaking where the nipple screws in. Truck feels more powerful and responsive paired with a new STC as well.

Images in this review

Helpful

Report
D. Dutton
the two bad things about this kit and others like it
Reviewed in the United States on January 22, 2018
Verified Purchase
UPon visually comparinng this kit with the 65 dollar one at the auto parts store. I can say they are the same. This being said; there are some goods and bads about this kit. first the goods. This is definitely worth doiong if you have a bit of a cold start problem. there is also noticible throttle response improvement on the highway. the two bad things about this kit and others like it. first..... on the new cover piece, the threads on the return pipe hole are rough they required so much turning in and out of the pipe fitting to fit the threads then there were shall metal shavings that had to be blown out. (no it wasn't cross threaded.). I finally tossed this part and used the original. The other bad, which isn't an issue on the newer moddel 6.0, but on mine, there is a black plastic sleeve that snaps into the fuel cup. the only way it willl actually snap in is with the correct seal. The o ring that campe with this kit for this sleeve was too big to do this for my truck. so I seated it in the hole and put the sleeve in front of it. This seal lasted for 2 days. So, a quick trip to the harware store netted an o ring of the same diameter but with a thinner wall. The sleve snaped in truck runs great.

Read more

3 people found this helpful

Helpful

Report
Larry
Fuel PSI increase and easy to do.
Reviewed in the United States on June 11, 2019
Verified Purchase
Broke down and upgraded to the blue spring. Now my fuel psi is sitting higher than 50, which is great because this keeps air out if the injectors and prolongs their life. Very easy to do. I had the entire housing off when I did it, and it went fast. I think the bolts could have been better quality because you need to have them on the housing pretty snug and they wanted to try and strip on me, thankfully not and I got it on. But it works as advertised and love it so far.

Read more

One person found this helpful

Helpful

Report
Peter D Nguyen
Caution and Buyer Beware !
Reviewed in the United States on March 30, 2025
Verified Purchase
I would not recommend this item. It is preferred by Amazon and has decent reviews. Also decently priced. After installation my fuel pressure was much less than original and below a safe threshold holding fuel pressure at 40 psi at idle. The replacement metal housing was subpar with the threads nearly impossible to screw in properly (bad machining). The special gasket was also visually suspect looking to be not smooth and showing signs of deterioration and fitting issues. I still used it and it did not seem to leak. I am now outside my placement window as it took me above 30 days to actually get the part installed and tested. Just had to order the OE version today. Would suggest buyers be cautious on purchasing this item.

Read more

Helpful

Report
Ashley
Good Spring, Bad Gaskets, O-rings & Metal Housing
Reviewed in the United States on April 10, 2019
Verified Purchase
All I really bought this for was the spring. Spring did seem to be more heavy-duty. Some of the o-rings in the kit we're not sized right so I had to use my old ones. It would have been nice to be able to change out the o-rings with new ones to provide longer-lasting and new seals. You guys who compiled this get together really should fix the issue that many people have had purchasing this kit and put it in the proper size o-rings. I also used my old metal housing because the one with the kit had metal burrs that weren't cleaned off properly so I didn't want to risk metal shavings getting into my fuel system. Along with this the threads we're not done properly so I couldn't even thread to the fuel line fitting into it.

Again I did only purchase this for the spring but seriously if you're going to provide a kit at least provide good parts and good o rings and the gaskets.

Read more

8 people found this helpful

Helpful

Report
Michael Skaggs, Billings, MT.
6.0L powerstroke diesel. Easy install, works GREAT!
Reviewed in the United States on April 14, 2019
Verified Purchase
I used the stock housing for no other reason than that I couldn't remove the male fitting from it lol. So, I have a 2003 F250 6.0L powerstroke diesel. I ordered this part just as a preventative maintenance measure. The day it arrived (Friday) I was at work. When I drove to lunch my truck started running and idling rough. I don't know much about diesels but I know that a rough idle has something to do with the internal combustion. An injector, fuel, air intake, something. Anyhow, I got home and went ahead and installed the blue spring and all the seals. The truck is still idling rough but no where near as bad! So I did some research and discovered that I have a low ficm voltage output. Meaning the injectors aren't getting enough power to function correctly. But, even with that issue, this spring has increased the fuel pressure enough to subside the extremely rough idle that a bad ficm causes. That's awfully impressive! Anyhow, I'll be installing a new ficm this week. I'll post an update on how it's running afterwards.

Read more

15 people found this helpful

Helpful

Report

Top reviews from other countries

Amazon Customer
Complete Garbage
Reviewed in Canada on March 27, 2022
Verified Purchase

The spring didn't even fit in the holder that literally came in the same package as the spring... I had to drill it out to make it work and almost ruined it doing so.

The gasket it came with and the cover were garbage and leaked gas all over the place no matter how tight I made it. Took it off and threw it all in the garbage. Put the original ford cover and gasket back on.

Read more
Report
Jon W.
Works
Reviewed in Canada on October 9, 2021
Verified Purchase
Works

Read more
Report
Chad
Do not buy product is garbage
Reviewed in Canada on July 26, 2022
Verified Purchase
Bought this in feb
Fas forward to today this product put out less than 25 psi
Destroyed 4 injectors due to lack if fuel pressure
Had a 3k tow bill and I assume a 2k bill to change 4 injectors and a new parts to replace this junk.

Read more
Report
Richard B.
Covers all variations of fuel regulators.
Reviewed in Canada on August 3, 2019
Verified Purchase
Kit was very complete. Covered all variations . Easy to install with basic tools.

Read more
Report

See more reviews

6.0 Blue Spring Kit Upgrade - Fuel Regulator Kit - Compatible with Ford Trucks - Blue Spring Kit 6.0 Powerstroke F250, F350, F450, F550 2003, 2004, 2005, 2006, 2007-Replaces 3C3Z-9T517-AG, 3C3Z9T517AG

Additional Details

Frequently purchased items with fast delivery

Product Description

Fits The Following 6.0 Powerstroke Vehicles:

Complete Kit With Everything You Need For An Easy Installation

Perfect For Stock or Modified Trucks

Experience the AA Ignition Difference!

ASE Certified Technicians

Strict Quality Control

An American Business

Product information

Technical Details

Additional Information

Warranty & Support

Feedback

Where did you see a lower price?

Compare with similar items

Videos

Videos for this product

Videos for this product

Videos for this product

Customer reviews

Review this product

Customers say

Select to learn more

Images in this review

Reviews with images

Doesn’t leak

Top reviews from the United States

There was a problem filtering reviews. Please reload the page.

Doesn’t leak

Images in this review

Top reviews from other countries

1.0 out of 5 stars Complete Garbage

5.0 out of 5 stars Works

1.0 out of 5 stars Do not buy product is garbage

4.0 out of 5 stars Covers all variations of fuel regulators.

Complete Garbage

Works

Do not buy product is garbage

Covers all variations of fuel regulators.