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