KB PERFORMANCE Piston Kit - 4.250" +0.005" - 11.4:1 CR - 124" Big Bore - 107" M8 [KB576LCA005]

KB PERFORMANCE Piston Kit - 4.250" +0.005" - 11.4:1 CR - 124" Big Bore - 107" M8 [KB576LCA005]

Manufacturer Part Number: KB576LCA005

Parts Unlimited Part Number: 09106178

Product Type: Piston & Ring Kits

Piston Kit - 4.250" +0.005" - 11.4:1 CR - 124" Big Bore - 107" M8

Details

• Compression Ratio: 11.4:1
• Piston Head Shape: Domed
• Bore - Oversize: +0,005"
• Bore - Oversize: +0.005"
• Stroke Length: 4.375"
• Style: Forged
• Units: Kit
• Displacement: 124"
• Model: Super Duty
• Piston Material: 4032 Aluminum Alloy
• Riding Style: Street
• Bore Size: 4.250"
• Product Name: Piston Kit
• Type: Big Bore
• 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.

Verified Fitment

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• 2018 Harley-Davidson FLHC Heritage Classic 107
• 2020 Harley-Davidson FLHC Heritage Classic 107
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• 2020 Harley-Davidson FLHT Electra Glide Standard
• 2021 Harley-Davidson FLSB Sport Glide 107
• 2023 Harley-Davidson FLSB Sport Glide 107
• 2018 Harley-Davidson FLSB Sport Glide 107
• 2019 Harley-Davidson FLSB Sport Glide 107
• 2022 Harley-Davidson FLSB Sport Glide 107
• 2024 Harley-Davidson FLSB Sport Glide 107
• 2020 Harley-Davidson FLSB Sport Glide 107
• 2018 Harley-Davidson FLFB Fat Boy 107
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• 2019 Harley-Davidson FLFB Fat Boy 107
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• 2018 Harley-Davidson FXLR Low Rider 107
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• 2019 Harley-Davidson FXBB Street Bob 107
• 2018 Harley-Davidson FXBR Breakout 107
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