DRAG SPECIALTIES Replacement Piston — Bore 3.498", +0.010" oversize, Stroke 4-1/4" – 79-84 Big Twin, 80-84 Touring, 82-84 FXR, 84 Police
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OEM-quality cast aluminum alloy pistons; kits include two pistons, wrist pins and clips. Accepts OEM or Hastings rings (sold separately).