I was very skeptical that this product would have any positive affect on my 2002 Powerstroke... WOW, was ever wrong about that! I really liked that I was given 3 (three) different springs to play with and that new O rings were included in the purchase! I chose to use the gold spring since my truck is basically stock (no programmer). Went for a test drive after installing it and was VERY impressed with my results. Truck seemed more responsive to the go-fast pedal and seemed to quieten down some too. Installation was a breeze... even though I’m not the best “wrencher” around by any means! Took me longer to round up tools out of my toolbox than it did to change the spring and O rings out! Literally, if I can do it then ANYONE can. Another home run for my truck and my wallet with this simple yet effective upgrade. This wasn’t my first Riffraff purchase and it definitely won’t be the last!!!

Installed the gold spring from this kit. It seemed to have really quieted down my engine at idle. A little better throttle response also.

Inexpensive, and I definitely noticed an improvement in throttle response in the low to mid throttle application.

Shipped fast and packaged well. Very inexpensive. Tried the gold spring, but too much pressure that seemed to over fuel my truck. Went back to the new silver stock spring and noticed quicker throttle response. There was quite a difference between my old spring and the new replacement. Having 3 springs to play around with is a great idea. Very easy to install. Would do it again....

I was very surprised by the immediate results if replacing the fuel spring in my 2000 f350 7.3. Throttle way more responsive now love this simple 5 min swap. I highly recommend this easy upgrade.

Great kit! Used the gold song to bump up the fuel pressure a little and really woke the truck up! Very satisfied

I have 410,000 miles on my all original stock 7.3 with only 125 horse power program in it. I thought it was just getting old and tired it idles rough and smoked when I first start it up in the morning I didn't have a fuel pressure gauge so I don't know what my fuel pressure was before or after the job I use the gold spring compared to the one I pulled out it looked about 1/4 inch taller. I can't believe the difference it made it feels like I rebuild the motor and the Turbo it idles smooth has tons more power and so far I haven't seen the smoke in the morning. Even a passenger noticed how smooth it was running. I wouldn't have believed it unless I did it myself, absolutely the best $13 I've spent on my truck since I bought the topless hula dancer for my Dash!

I haven’t installed them yet but they look like they are very well made

thanks clay for continuing to provide quality products at a reasonable price and fast shipping. you definitely help me keep the ol' girl on the road and running in top shaoe at that!