Supertech Spring kit
Very happy with the overall experience of buying from Zzp. Fast and efficient delivery, no problems at all. No hesitation in recommending Zzp.
New short block also
I had a warranty issue with a complete engine I purchased, ZZ stood behind their product covered the needed repair under warranty, no hassles, very happy customer. Thank you
75# Supertech Valvesprings
I've been running these in my LSJ for almost 3 years now. With 300+ whp and a 7750rpm limter, these springs have held up to the task of higher lift cams, and multiple high rpm runs on the dyno and street. These are without a doubt the best out there for our cars. Do not read into the nonsense posted that they cause failed valve seals. That's a marketing gimmick to sell the ZZP springs over these.