10 bolt intake manifold pattern or stock 16 bolt configuration. Stock low exhaust port or raised port. Stock or aftermarket exhaust manifold/header bolt patterns available.
Stage V Conversion heads start out as foundry fresh castings which incorporate numerous revisions allowing them to be used on any B or RB wedge block. The stock outward appearance has been preserved for those with an interest in getting the impressive good looks of an actual Hemi. But inside, our Conversion heads feature improved ports which will out flow any similarly prepared 426 Hemi head. It's the best of all worlds original looks, low cost and better performance.
The intake port openings on all Conversion heads are 10% large than stock for enhanced breathing and stock Hemi manifolds bolt right on. The increased intake port dimensions allow the engine builder to enlarge the intake manifold runners to match if maximum output is desired.
All Stage V Conversion heads accept 2.25" intake valves and 1.900" exhaust valves. The smaller exhaust valves are proven to flow more air than the stock 1.94" unit. Also chances of valve-to-valve contact during overlap with radical cams is greatly reduced. Although the head appears to be able to accept dual spark plugs, the repositioned exhaust rocker shaft specific to Conversion heads prevents the use of dual plugs. Besides, unless you are running blown fuel, dual plugs do little more than add to expense and complexity.
Specific Stage V Hemi Conversion rocker arms and stands are required, along with some necessary support items.