Bennett 'Hi-port' aluminium cylinder heads for your '69-'86 Holden 308 are definitely not for the faint-hearted!

Cast from 356-T6 aluminium with a 56cc combustion chamber, these new heads offer unbelievable horsepower potential right out of the box. They're designed specifically to allow the use of any inlet and exhaust manifolds currently available. Dave Bennett, Australia's foremost performance head designer, has, by raising the inlet ports .600" and added extra material on the inlet face have dramatically improved the air flow of his highly acclaimed 308-1 heads, which are still available for more moderate applications. The results of the new Hi-port design are phenomenal! More air = More Power.

The simple change from standard heads to these highly engineered aluminium units, when combined with complimentary components, will yield up to 39.5% more air flow and dramatically improve cylinder filling over stock heads. The result is significantly more power output from your engine. There is an increase in air flow from the superior Hi-Port design. Potential horsepower is directly proportional to air flow.

Assembled heads ready to bolt on. Fitted with 1.940" & 1.600" valves and duel springs with 135 lbs on seat. Machined for screw in studs or Platinum shaft rockers.

Product Reviews for YTABHA308-3 - YT