Wiseco Subaru EJ257 Piston Set - 99.75mm Bore, Forged Racing Pistons for High-Performance Builds

Professional Series forged racing pistons from Wiseco are no-expense-spared pistons designed for the serious racers and builders. Packed full of custom-level performance and durability features and provided with premium rings, Professional Series pistons are designed and built for use in heavy to severe duty race builds. Remove your limits with Wiseco?s Professional Series. Wiseco Subaru EJ257 Piston Set, 99.75 mm Bore, 30.70 mm Compression Height, 0.9055 in. Pin Diameter, Sport Compact, Set of 4.

• Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength
• Precision ring grooves, anti-detonation groove, and additional ring seal improving features
• ArmorGlide Skirt Coating: seizure resistant, friction reduction, and quieter operation
• Designed and built to withstand heavy to severe duty performance applications
• Fully machined crown features
• Forced pin oiling

The Wiseco K598M9975AP Professional Series forged pistons are engineered for serious Subaru EJ257 engine applications. Crafted from 2618 aluminum in the USA, these pistons offer enhanced tensile strength and durability for high-stress race environments. Designed specifically for 99.75mm bore engines, they feature precision machined crown surfaces and multiple ring grooves, including an anti-detonation groove to improve sealing and combustion efficiency. The set includes premium rings and is built to withstand heavy-duty performance demands, making it ideal for severe racing and performance upgrades. The ArmorGlide skirt coating reduces friction, minimizes seizure risk, and provides quieter operation, contributing to longer-lasting and more reliable engine performance. Forced pin oiling further enhances durability by ensuring consistent lubrication, even under extreme conditions. These pistons are fully machined for precise fitment and designed to help racers and builders remove limits and achieve maximum engine potential. Please note that these pistons are not CARB approved and require acknowledgment of this when installing. They are suitable for use in high-performance racing applications where durability and precision are paramount, offering a professional-grade solution for serious automotive enthusiasts.

Features:

• Engineered, forged, and machined in the USA from 2618 aluminum for improved tensile strength

• Precision ring grooves, anti-detonation groove, and additional ring seal improving features

• ArmorGlide skirt coating for seizure resistance, friction reduction, and quieter operation

• Designed and built to withstand heavy to severe duty performance applications

• Fully machined crown features for precise fitment

• Forced pin oiling to ensure consistent lubrication under extreme conditions

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1