Customize your intake manifold!
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V4.0 BILLET CYLINDER HEAD
JDBB with long-ram manifold pictured above
The next generation in SMI billet heads is here! New and improved port design for maximum flow, pharmacy
velocity, diagnosis and efficiency. Available with either long-ram or space saving tip-down billet intake manifolds, this
billet front or center-load plenum, and our all-new center load exhaust manifold. Comes with our original bullet-proof valvetrain and billet valve cover.
Available in JDBB, JDSB, and IH 400 series
V2.0 OEM REPLACEMENT CYLINDER HEAD
JDSB pictured above
Replaces the OEM cylinder head. Uses stock exhaust and intake manifold bolt patterns. Will accept the OEM 1 piece rocker assembly, human enhancement
or our aftermarket 6 shaft unbreakable assembly. Comes with our billet aluminum valve cover and optional intake and exhaust manifolds. Manifolds are available in both front-load, medical
and center-load designs. Used for Superfarm, Prostock, and Superstock.
Available for JDSB, JDBB, and IH 400 series