MHP 4.250" bore High HP Complete Upgrade Kit - Oil Cooled Heads - MHP-5050
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MHP 4.250" bore High HP Complete Upgrade Kit - Oil Cooled Heads - MHP-5050

$3,389.75
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Moonshine Horsepower +6.4cc Pistons are designed to be a direct replacement for 4.250" S&S 128 and 131 setups when running a high horsepower camshafts with larger intake duration on your M8. We have paired these pistons with our MHP Street Fighter +1.5mm Valved heads, MHP-588 camshaft and 4.250" bore 0.040" thick Cometic Head Gaskets for a complete upgrade kit to your S&S 4.250 cylinders (128 &131 setups) or upgrade your 128/131 S&S power packs.   Dyno sheet shown is a 128 4.250" and 4.500" with this complete setup. For more information please call the shop at 615-274-4170 and ask for Nick Zinola, Aaron Staudinger or Jamie Lima ONLY.  PISTON FEATURES; Designed to run on pump gas equivalent to 91 octane or greater. CP Carrillo X-Forgings +6.4cc dome .043 top ring .043 second ring 3.0 oil control ring V-Shaped Accumulator Groove Underhead CNC Milled, Lighten  Shelf Mill, Lighten Double Oilers Per Pin Side COMBATIBLE WITH THESE SETUPS AND PARTS; 128 cubic inch, 4.250" c

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