S&S Cycle 106-4270 Super Stock 89cc Cylinder Head Kit For 1999-’05 HD Big Twins – Silver Powder Coat Finish

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Original price was: $2,305.95.Current price is: $2,075.36.

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SKU: 106-4270 Categories: ,
0930-0068
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Description

S&S Cycle 106-4270 Super Stock 89cc Cylinder Head Kit For 1999-’05 HD Big Twins – Silver Powder Coat Finish

  • Heads are fully assembled with springs and valves
  • Heads are machined for compression releases unless noted otherwise (sold separately); S&S rocker boxes required when using S&S compression releases
  • Not compatible with Twin Cooled heads.

These S&S® Super Stock® high performance cylinder heads are designed for 1999-’05 engines with stock crankcase. They work well with engines of stock displacement, but are ideal for somewhat larger stroker or big bore engines up to 110″. The 89cc combustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines. This makes them a good choice for touring bikes and other heavy vehicles. The large 2.000″ intake and 1.605″ exhaust valves maintain port velocity for good low and midrange response, but supply enough air for slightly larger engines to perform to their full potential. S&S® High performance valve springs allow the installation of camshafts with up to .650″ lift. Intake ports flow 264 cfm compared to stock heads at 182cfm. S&S® High performance valve springs allow the installation of camshafts with up to .650″ lift. Compatible with stock rocker boxes, exhaust, and intake manifolds. Silver powder coat finish matches stock silver engine components.

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