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GM LS3 Stage 1.5 FED Heads (5364/821/823/LSA/LS9)


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Looking to spray more than a 200 shot or turn the boost up a bit more?  With an upgraded Manley stainless 2.165″/1.590″ intake and exhaust valve combination, our Stage 1.5 ported GM square port LS3 heads are EXACTLY what your ride needs to put the power to the ground.  Need pushrods, cam, intake, lifters, gaskets or anything else LS on the planet?  We’ve got them on the shelf ready to ship!  Contact us now if you have any questions!

Intake & Exhaust Valves: Manley Stainless 2.165″/1.590″
FED .660″ Dual LSX Spring Kit/Titanium Retainers
Teardown/Wash/CNC Valve Job/CNC Port/FED Logo
Hand blend/Surface/Final Wash/Assembly .010″ surfaced

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