More Power for Your ‘604 Crate-We Port Your Heads, New Heads also available.
If you want to get a huge advantage over the car next to you, get your heads Ported with the CTS “UnderCover Porting” and it makes a Huge Difference. They require a lot of “UnderCover” work and definitely it is worth it. Or, don’t get them modified and run just like the rest of the pack. Adding 25 Extra Horse Power!
The “UnderCover Porting” to the ‘604 makes a huge difference, Adding 25 Extra Horse Power! They require a lot of “UnderCover” work and it is worth it. We Port your cylinder heads that you send us and return them two in approximately one to two weeks or less.
Disassemble and clean YOUR ‘604 cylinder heads
“UnderCover Porting” modifications to intake ports, exhaust ports.
Un Shroud valves in chambers.
Hone the valve guides to correct clearances.
Machine a flow bench developed 4 Angle valve job.
OPTIONAL ADD ON PACKAGE-SOLD SEPARATELY.
Surface the heads to the original cc’s, or smaller if you want.
New Look-a-Like BeeHive valve springs that will not lose spring pressure like the Chevy springs.
Reassemble Heads with Chevrolet style valve seals.
READY TO BOLT ON AND WIN!