PAIR of Chevy BBC 396 454 Rectangle Port Assembled Aluminum Cylinder Heads 124cc 330cc

PAIR of Assembled Big Block Chevy Aluminum Cylinder Heads

330cc Intake Port • 124cc Chamber • 2.25"/1.88" Valves

This is a new pair of our newly released Assault Racing rectangle port big block Chevy aluminum cylinder heads. These heads are assembled and ready to bolt on! Don't settle for a lesser set of cylinder heads, these are the best on the market at this price point! The casting quality is second to none, and these heads have been precision machined to exacting specifications!

These are the biggest and baddest sets of heads we have on the shelf, with monstrous 330cc runners! They'll handle everything you can throw at them: boost, nitrous, and ultra-high compression! From stump pulling to top fuel, they'll handle it!

• Hardened exhaust seats
• Bronze valve guides
• Aircraft quality high grade aluminum alloy
• Multi-angle seat design for improved flow at low lifts
• Advanced port design for improved flow at all lifts
• Advanced combustion chamber design allows superb flame travel and burn
• Additional pushrod clearance machined along outside port walls
• Threaded accessory holes in ends of heads
• Thick deck to resist warping and allow for additional milling if desired

 All assembled heads are assembled right here in Iowa in our machine shop and checked by our machinists before leaving!Assembly features:

• 1.525" diameter valve springs, good to .650" lift (flat tappet cams)
• Stainless steel 1 piece swirl polished valves
• 10 degree chromoly steel retainers
• Hardened steel valve locks

These are the best place to start when planning your next performance engine project. Perfect for high revving drag racers & stroker applications! Lots of features at a nice price makes these perfect for anyone that has always wanted to try aluminum heads or those doing more serious race duty as well. When paired with engine size and intended use these flow well and make power - many of our customer's favorite!