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

Everyone complaining it's so expensive to 'bulletproof' a 6.0... do you all see these prices!!!

This worked very well besides some alignment issue but I only bought it for the physical purpose, not the housing. Consistent increased fuel pressure

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.

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.

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.

1. replacement screws require work as they painted over the torx hole and so it won't fit the torx bit unless you scrape the paint off first.2. main gasket surface is not machined, just raw casting, it sealed just fine but in comparison to the old one which IS machined I don't particularly trust it.3. Bypass hole is too big, new bypass hole measures 0.5 mm across, original measures 0.2 mm across4. older 6.0 requires a plastic insert and an additional oring, old plastic piece and brass insert had a tight no wiggle fit that insured the brass stayed straight and had a good seal. the in this kit was very loose and right out the gate wouldn't stay straight under pressure causing it to seal very poorly.5. got a blue spring kit from a more reputable source which right out the gate hit 92 psi versus the 18 which was the most I could get out of this one.

The spring and the gaskets is the only thing that I was able to use. 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.

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.

Works

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.

Kit was very complete. Covered all variations . Easy to install with basic tools.

Bought this in febFas forward to today this product put out less than 25 psiDestroyed 4 injectors due to lack if fuel pressureHad a 3k tow bill and I assume a 2k bill to change 4 injectors and a new parts to replace this junk.