Fits ZZ4 and Fastburn 604 Crate Engines.
Designed for Nascar Oval Track Racing.
NEW MSD 85551 Pro-Billet Distributor.
NEW GM Melonized steel gear installed, required for crate engines!
Lockdown Advanced tig welded with silicon bronze, with Rotor Phasing.
Proven for more accurate timing.
Horse Power gains on shop engine dyno testing!
