- factory ones
Fit perfectly and light in weight
Absolutely fantastic shipping, and products.
Engine rebuild is finished and up and running great, The valve train and rockers arma are perfectly quite, I did however have to add a .060 shim between the rocker arm mount on the head and the aluminum pushrod guides/rocker mount pedestal because lifter pre-load was 1.75 turns past zero lash, the shim brought the lifter preload about .75 turn past zero lash. New stock length push rods, Rocker to valve stem contact is perfect, valve train is perfectly quite! I only have a few miles on the engine so far, I hope these ZZP rockers last 200k miles like the factory ones!
excellent these rocker assm saved the day Thank You
great product, easy to install
they great for my 1999 firebird with the series 2 3.8l product arrived early, and was easy to install. just put em on, set lash and torque to the specs given. the ease of mind knowing your 20+ year old valvetrain has less stress on it is well worth the price. highly recommend zzp push rods, springs, and spring caps with these while you're at it
1.65 ratio rocker arms
I recommend this product because you will feel an increase in rpm response and you will definitely feel the power kick in