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Style: Updated Formula
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Reviewed in the United States on May 26, 2026
Piston & Ring Kit - Big Bore Oversize - 81mm
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Piston & Ring Kit - Big Bore Oversize - 81mmXS Performance 1st. Oversize (81mm) Forged Big Bore Piston Kit. Piston includes ring set for 1 piston, piston pin(1) and pin clips(2). Forged Piston features: 1. Valve pockets cut for large valves. 2. Mos2 treated piston skirts. 3. Oil channel for enhanced wrist pin oiling. 4. 20mm. piston pins that are internally tapered to ends for weight reduction. 5. Lightweight 9: 1 piston assembly weight of approx. 340 Grams. Fits to 1974 84 447 type engines
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