Big Block Clones LLC
Shredder RPM+ Cylinder Head For GX200 and Clones
Shredder RPM+ Cylinder Head For GX200 and Clones
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This is our standard 80CFM Shredder head with lapped valves and hand assembled with a high RPM valvetrain that will support up to 0.450" lift at the valve and 9000+ rpms.
Rocker arms are safe to .400" valve lift, but can be ground on the valve side (not pushrod side) from .350" to .390" and will support up to .450" lift.
The following hardware is assembled into this ready-to-run head:
28.5mm x 2.590" x 5.5mm stem stainless steel intake valve
24mm x 2.580" x 5.5mm stem stainless steel exhaust valve
0.015" steel spring shims
Comp Cams GP960 dual springs installed at 0.950" for 40lbs of seat pressure.
Titanium retainers (weighs a touch less than 7071 aluminum but has more strength and much better fatigue resistance.)
Steel medium groove keepers
Lightweight lash caps
Steel pushrod guide plate
1.2:1 ratio 0.095" thick stamped steel rocker arms with studs, lash adjusters, and locking nuts. (308 cam gets to .369" lift, 315 gets to .378" lift) **Rocker arms are safe up to .400" valve lift, but the lower opening can be ground on the valve side (not pushrod side) from .350" to .390" total length and they will support up to .450" lift without binding.**
Pair this head with a Dyno 310 cam and our 28mm carburetor kit for a 20hp capable engine.
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