Heads are sold as a pair of 2 and Fit Both Mark IV and Gen 5/6 Blocks.

*123cc Combustion Chambers, Advanced Design Allows Superb Flame Travel and Burn *2.25” Intake Valve Size and 1.88” Exhaust Valve Size *366cc Intake / 147cc Exhaust Runners, Advanced Port Design for Improved Flow at All Lifts  *Bronze 11/32nds Guides, Cut for .530 Valve Guide Seals *Hardened Exhaust Seats with Multi-Angle Seat Design for Improved Flow at Low Lifts *Aircraft Quality High Grade Aluminum Alloy, Thick 1/2" Deck Casting to Resist Warping *Threaded Accessory Bolt Holes in Ends of Heads *1.625" Max Spring Diameter

We can also blueprint and assemble the heads to suit your application and camshaft selection. Fully assembled pricing starts at $1500/pair