89" High Compression Stroker Pistons For 1984-'99 HD® Big Twins And 1986-'03 HD® Sportster® Models W/ Super Stock Heads - +.010"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. +. 010" oversize.
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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 - +.010"