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KB PERFORMANCE  |  SKU: 0910-6404  |  Barcode: 800745276162

Super-Duty Big Bore Piston Kit

$446.95
Shipping calculated at checkout.
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  • In stock. Order by 1:00 PM PT Monday–Friday and it ships the same business day.
  • Delivery timing: use your FedEx tracking after shipment.
  • Small parts and accessories: $9.99 in the contiguous U.S. Larger items and Alaska/Hawaii: quoted at checkout.
  • Local pickup: choose pickup at checkout where available. Wait for your ready notification.
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Description

Piston Kit - 4.250" +0.005" - 11.8:1 CR - 124" Big Bore - 107" M8

  • Valve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valves
  • Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels
  • Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on
  • OE-style round wire locks are easily installed
  • Heavy-duty wrist pins with true 0.9270” diameter to fit rods correctly
  • Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation
  • Kit includes pistons, rings, pins and locks
  • Requires 4.250" bore cylinder sold separately.