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Free Shipping on orders over $69.99 to the continental 48 (Alaska & Hawaii orders, call 402-214-0706 to order).
All products have accurate in stock quantities listed, if it shows in stock it’s actually in stock!
Free Shipping on orders over $69.99 to the continental 48 (Alaska & Hawaii orders, call 402-214-0706 to order).
All products have accurate in stock quantities listed, if it shows in stock it’s actually in stock!
JE Pistons

JE Pistons Ultra Series Piston Kit - 394138 For Harley Motorcycles 2018-2026

MPN: 394138 SKU: 0910-6856
JE Pistons

JE Pistons Ultra Series Piston Kit - 394138 For Harley Motorcycles 2018-2026

MPN: 394138 SKU: 0910-6856
Availability:
Only 2 left!
Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment Cermic crown coating protects the piston by reducing heat transfer Internal and external bracing maintains optimized strength-to-weight ratio for longevity 3D undercrown milling in non-critical areas reduces overall weight Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost Skirt coating reduces operating friction and wear throughout the life of piston Offset pin reduces piston rock and minimize engine operating noise Skirt notches for optimal clearance at the bottom dead center Kit includes two pistons, premium ring pack, wrist pins and wire locks Specs Model Ultra Series Product Name Piston Kit Riding Style Street Bore Oversize Standard Bore - Oversize Standard Piston Material Forged 2618 Aluminum Piston Head Shape Dished Compression Ratio 10.25:1 Bore Size 4.250" Stroke Length 4.500" Units Kit Part Notes Kit Includes: • 2x Ultra Series Pistons • 2x Wrist Pins • 2x Ring Sets • 2x Wire Locks
Original price $729.99 - Original price $729.99
Original price
$729.99
$729.99 - $729.99
Current price $729.99

Product Details

Features

  • Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment
  • Cermic crown coating protects the piston by reducing heat transfer
  • Internal and external bracing maintains optimized strength-to-weight ratio for longevity
  • 3D undercrown milling in non-critical areas reduces overall weight
  • Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost
  • Skirt coating reduces operating friction and wear throughout the life of piston
  • Offset pin reduces piston rock and minimize engine operating noise
  • Skirt notches for optimal clearance at the bottom dead center
  • Kit includes two pistons, premium ring pack, wrist pins and wire locks

Specs

Model Ultra Series
Product Name Piston Kit
Riding Style Street
Bore Oversize Standard
Bore - Oversize Standard
Piston Material Forged 2618 Aluminum
Piston Head Shape Dished
Compression Ratio 10.25:1
Bore Size 4.250"
Stroke Length 4.500"
Units Kit

Part Notes

  • Kit Includes:
  • • 2x Ultra Series Pistons
  • • 2x Wrist Pins
  • • 2x Ring Sets
  • • 2x Wire Locks

Product Description

Features

  • Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment
  • Cermic crown coating protects the piston by reducing heat transfer
  • Internal and external bracing maintains optimized strength-to-weight ratio for longevity
  • 3D undercrown milling in non-critical areas reduces overall weight
  • Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost
  • Skirt coating reduces operating friction and wear throughout the life of piston
  • Offset pin reduces piston rock and minimize engine operating noise
  • Skirt notches for optimal clearance at the bottom dead center
  • Kit includes two pistons, premium ring pack, wrist pins and wire locks

Specs

Model Ultra Series
Product Name Piston Kit
Riding Style Street
Bore Oversize Standard
Bore - Oversize Standard
Piston Material Forged 2618 Aluminum
Piston Head Shape Dished
Compression Ratio 10.25:1
Bore Size 4.250"
Stroke Length 4.500"
Units Kit

Part Notes

  • Kit Includes:
  • • 2x Ultra Series Pistons
  • • 2x Wrist Pins
  • • 2x Ring Sets
  • • 2x Wire Locks

Part Numbers
Store SKU MFR. Product # Availability
0910-6856 394138 In Stock
Fitment
This product is vehicle specific. Select your vehicle to confirm fitment.

This Product Fits

Fitment Disclosure

This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.

Features

  • Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment
  • Cermic crown coating protects the piston by reducing heat transfer
  • Internal and external bracing maintains optimized strength-to-weight ratio for longevity
  • 3D undercrown milling in non-critical areas reduces overall weight
  • Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost
  • Skirt coating reduces operating friction and wear throughout the life of piston
  • Offset pin reduces piston rock and minimize engine operating noise
  • Skirt notches for optimal clearance at the bottom dead center
  • Kit includes two pistons, premium ring pack, wrist pins and wire locks

Specs

Model Ultra Series
Product Name Piston Kit
Riding Style Street
Bore Oversize Standard
Bore - Oversize Standard
Piston Material Forged 2618 Aluminum
Piston Head Shape Dished
Compression Ratio 10.25:1
Bore Size 4.250"
Stroke Length 4.500"
Units Kit

Part Notes

  • Kit Includes:
  • • 2x Ultra Series Pistons
  • • 2x Wrist Pins
  • • 2x Ring Sets
  • • 2x Wire Locks