PPE Fuel Rail Shim
 

what are the benefits of the shim kit, and is it needed on a stock lbz?

not really needed on a lbz, theyr designed to run 26kpsi anyway

Are they needed if i do a little work to the motor. A sales guy is tryingh to sell me one not sure if i even need it????????? I am just doing exhuast and cheetah refresh on the turbo (vane locked up) and a EGR blocker. Maybe a tune down the road but also should i just put the shims in since ill have it all apart?

put a race valve in the rail too

I don't see a rreason why you had to remove it in the first pplace. But you don't need to shim it unless your planning on running over 26000psi. If you dobt believe be mcrat's truck Wendy runs mid 12's with no shim or plug in the rail.