89" High Compression Stroker Pistons For 1984-'99 HD<sup>®</sup> Big Twins And 1986-'03 HD<sup>®</sup> Sportster<sup>®</sup> Models W/ Super Stock Heads - +.020"
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89" High Compression Stroker Pistons For 1984-'99 HD® Big Twins And 1986-'03 HD® Sportster® Models W/ Super Stock Heads - +.020"

Item #: 92-2018
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These high compression 3-1/2" bore forged stroker pistons for 1984-'99 HD® big twins are a high compression option for 89" stroker kits for 1984-'99 with 4-5/8" stroke flywheels and S&S® Super Stock heads. 12:1 compression . These pistons may also be used in stock stroke 1200cc HD® Sportster® models with S&S® Super Stock heads.10:1 compression. +.020" oversize.

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Recommended Piston Fitment: Close .0020"-.0025" Loose .0030"-.0035" Cylinders in 1986-'03 883cc HD® Sportster® Models may be bored from the stock 3" bore to 3-1/2" for these pistons.