M8 Big Bore Kit, 117 to 128, Black Granite with Highlighting, 4.250 bore x 4.5 strokeFeatures & Benefits Available 117 M8 models 117 to 128" big bore kit Black Granite with Highlighted Fins Bolt on kit. No Machining Required includes gaskets and hardware required for installation 4. 250" bore Forged Pistons 11: 1 compression ratio ***We recommend using S&S Cycle Head Bolts for M8, part number 900 1006 for all big bore applications. Not recommended for Tri Glide or other three wheel models including conversion due to lugging nature of
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M8 Big Bore Kit, 117 to 128, Black Granite with Highlighting, 4.250 bore x 4.5 stroke