As low as $173.75/mo with or . (Pay in 4 interest-free payments)
JE PISTONS Ultra Series Piston Kit (4.310" Bore) — 10.25:1 CR Upgrade your engine with the JE PISTONS Ultra Series Piston Kit engineered for high-performance use. Designed with JE’s proprietary forging and coating technologies, this kit delivers confident strength, reduced heat transfer, and durable ring seal for spirited street driving and boosted applications. Key Features Proprietary aligned grain flow forging for maximum tensile strength in high-performance environments Ceramic crown coating helps protect the piston by reducing heat transfer Internal & external bracing maintains an optimized strength-to-weight ratio for long service life 3D undercrown milling in non-critical areas reduces weight Lateral gas ports & accumulator groove support power-producing ring seal at high RPM and boost Tuff Skirt moly-based dry film coating reduces operating friction for improved wear resistance Offset pin design reduces piston rock and helps minimize engine noise Skirt notches provide optimal clearance at bottom dead center What’s Included Two (2) pistons Premium ring pack Wrist pins Wire locks Specifications Bore Size: 4.310" (Oversize +0.060") Model: Ultra Series Material: Forged 2618 Aluminum Skirt Coating: Tuff Skirt Design: Forged Side Relief (Dished) Compression Ratio: 10.25:1 Stroke: 4.500" Riding Style: Street Weight: 3.4 lbs | Dimensions: 10.5" x 5.75" x 5.5"
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
Tuff Skirt is a propriety, moly based dry film skirt coating that is applied in-house and reduces operating friction for better wear resistance
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
or 
. (Pay in 4 interest-free payments)
