SS "PRO-FILER 12 DEGREE SPREAD PORT BIG BLOCK CHEVY HEADS - NITROUS - 4.840 BORE SPACING

New 12 Degree Nitrous

This new cylinder head option is the most advanced technology on the market today for both a nitrous or a big cubic inch engine. This hot new 12 Degree Pro-Filer Nitrous / Big cubic inch cylinder head features special exhaust ports.

* New - Our new proprietary nitrous combustion chamber.

New 12 degree technology for alcohol applications like contempary truck pull engines or top-sportsman engines. We made over 1380 H.P. with our new head on a 648 injected alcohol truck pull engine.

Includes Manley custom titanium valves, new head castings with complete head finished ports, springs, titaniun retainers, locks, spring cups and final assembly.

COMPLETE & RACE READY