If you are building a Hemi for Bonneville, blown fuel boat drag racing, Pro Mod or virtually any application where solid billet heads are not legal or water cooling is required, the Stage V Big Valve aluminum head is for you. Works best on bore sizes of 4.50 or larger to eliminate shrouding and prevent valve-to-bore contact. A competition port and polish procedure is strongly advised. As with our other Hemi heads, we can machine the Big Valve head to accept dual spark plugs.
10 bolt or stock 16 bolt intake manifold pattern configuration. Stock low exhaust port or raised port. Stock or aftermarket exhaust manifold/header bolt patterns available. Material can be addes to port runners at foundry allowing customer to enlarge ports to match of exceed those found on Top Fuel billet heads. Machine heads for dual spark plugs for enhanced ignition and increased engine setback where rules apply.