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Piston & Ring Kit - Big Bore Oversize - 81mm

Marsoni M251S
Sale price$145.00
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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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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.6 ★★★★★
Based on 270 reviews
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Elliot
Carnegie, US
★★★★★ 5
As good as Honda OEM
Perfect fit. Lasts as long as OEM for 25% of the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
F
Verified Purchase
Fatman
Fort Morgan, US
★★★★★ 5
Great fit
Perfect fit. FYI - I bought the exact same one on EBAY FOR $11.78
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Reviewed in the United States on May 2, 2026
A
Verified Purchase
Amazon Customer
Whiting, US
★★★★★ 5
East
Easy to replace and great fit
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Reviewed in the United States on January 4, 2026
T
Verified Purchase
Tom
Dallas, US
★★★★★ 5
Perfect fit
Nice quality
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Reviewed in the United States on May 10, 2025
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stan Hithersay
Lowell, US
★★★★★ 5
I'll get again.
Style: PA99892
Perfect fit and nice condition
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Reviewed in the United States on May 10, 2026

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