'602 Vortec Crate Motor Parts
'603 ZZ4 Crate Motor Parts
"Look-A-Like” Replacement Valve Springs
More horsepower and eliminate the valve train breakage. They look like the original springs, have more spring pressure and last a few thousand laps vs. a few hundered for the stock spring.
"Look-A-Like" Crate Motor Retainers
No more retainer breakage with our chrome moly retainers! Same look as the original retainers and a lot stronger. Fit #604S spring.
#604R - 16 "Look-A-Like" retainers for #604S valve spring - $100.00
The Fast Burn, Vortec Bow-Tie style aluminum heads on the '604 are excellent flowing stock heads. Unlike the heads on the '602 & '603 crate motors, which improve tremendously with “UnderCover Porting”, this head will not benefit from "UnderCover Porting" modifications.
We do offer an update program for your complete '604 crate heads. Our update program includes disassembly, cleaning, valve job, grinding valves, surfacing and reassembly with new Look-A-Like '604 springs, retainers and locks. The cost is $795.00 labor and parts to your complete '604 heads.
Looking for parts for the '603 ZZ4 Crate Motor?
Cylinder Head Design Form: Fill out our online form for a recommendation and pricing on a set of heads built specifically for your application. Also, here is a link to more detailed information on our Complete Cylinder Head Assemlies.
Cylinder Head FAQ'S
Sending your cylinder heads to us for modifications?
Brzezinski Racing Products, Inc. The #1 Name in Cast Iron. Call us toll free at 866-236-6300