DRAG SPECIALTIES Replacement Piston — 3.497" diameter, 3.437" bore, +0.060" oversize, 3-31/32" stroke, 8.5:1 – 41-80 Big Twin, 79-80 Touring
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OEM-quality cast aluminum replacement piston kit with two pistons, wrist pins and clips; accepts OEM or Hastings rings (sold separately).