129 Inch Big Bore Kit Black Cylinders For 17-23 M8 with 107 Inch engine

£173.40 OFF
S&S CycleSKU: 974961
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Price:
Sale price£1,560.59 Regular price£1,733.99

Condition: Brand New
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Description & Size Guide

2102cc kit. Converts the 107" engine to 129". Largest possible 4.320" bore bolt-in big bore kit. Stroker flywheels not required. Works with stock crankcases; case boring is not required; stock flywheels; stock heads and retains stock engine height. Kit includes a forged 4.320" big bore piston kit; black wrinkle powder coated 4.320" big bore cylinders; 2 MLS (Multi-Layer-Steel) .030" head gaskets; 2 cylinder base gaskets; 4 cylinder dowels and an S&S cubic inch cam cover batch. Black powder coated finish to match OEM finish. Note: For the 132" kit (to convert 114" engines) S&S measured 135.51HP and 145.83TQ with stock heads; a 550 cam; stock throttle body and a high flow Stealth air cleaner kit. Note: Tuning of fuel injection and ignition may be required. Note: S&S advises 576972 S&S head bolt kit for all big bore applications.

17-24 M8 with 107" engine (NU)

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