ARU Fuel Pressure Regulator Spring Replacement for The TBS 10320 GM from 11-12psi to 14-15psi Fuel Pressure Fit for 2.8L 4.3L 5.0L 5.7L 7.4L TBI Motors Length 2" Outer Diameter 1"

Easy to install and throttle response is way better than factory.

If you are going to rebuild your TBI make sure to get this spring and combine it with a better fuel pump. Perfect start, idle, and run. Much better cold starts too

I used this product to fix a 1984 Pontiac Sunbird 2000 with a non-turbo 1.8L 4cyl engine. The beauty of GM TBI is they're all pretty much the same as long as they're the same vintage. My car was having hyperlean problems past 50% throttle (bucking, missing, backfiring through intake). On the freeway, there was a very noticeable intermittent miss. I replaced every single sensor, replaced the fuel pump and filter, rebuilt the throttle body (except that spring), replaced the EGR valve, rebuilt the entire ignition system, and still no improvement. Testing fuel pressure gave me 9 psi - within spec, but on the low end. Replaced my stock spring with this gem, and all of my engine issues have finally disappeared! If you are experiencing intermittent backfiring through the intake under load, definitely CHECK YOUR FUEL PRESSURE before just buying this and throwing it in. People who have been leaving bad reviews for this product very obviously are NOT doing that.

This is a great product that works well and is very easy to install! These springs allow one to custom tailor the tune of their boost-referenced Aeromotive bypass fuel pressure regulator. This increases the usefulness and versatility of an already great product! I love it!

I swapped my fuel pressure regulator spring out for this one, and it is safe to say I am definitely getting more fuel pressure. This mod is not for newbies at all though, so I recommend looking up some tutorials or something if you have never done anything like this!

My original spring was rusted and broken, and this sping was a perfect fit ! Solved my drivabilty issues!!

Easy to install. Truck runs so much better no hesitation and can feel power increase.

I bought this to hopefully increase the fuel pressure on my tbi fuel injection boy did I make a huge mistake it did something to it. It wouldn’t even run. I had to take it back out and put the original spring back in it in order for it to run I would not recommend wasting my money on buying this spring.