Pistons
KB PERFORMANCE Piston Kit - 4.250" Standard - 11.8:1 CR - 124" Big Bore - 107" M8
Brand: KB PERFORMANCE
SKU: P1309430191439
$446.95
$388.15
Taxes and shipping calculated at checkout.
Super-Duty Big Bore Piston Kit
Fitment
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Product Details
Highlights
- 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.
Specifications
| Bore - Oversize | Standard |
|---|---|
| Bore - Oversize Imperial | Standard |
| Bore Size Imperial | 4.250" |
| Compression Ratio Imperial | 11.8:1 |
| Displacement | 124" |
| Model | Super Duty |
| Piston Head Shape | Domed |
| Piston Material | 4032 Aluminum Alloy |
| Riding Style | Street |
| Stroke Length Imperial | 4.375" |
| Style | Forged |
| Type | Big Bore |
| Units | Kit |
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