Manley Subaru WRX STI 2.5L EJ257 99.75 Mm Bore 1.285 In. CH 18.00 CC Dish Piston (Single) - 621002C-1

Our signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley...

Manley Subaru WRX STI 26cc Dish Piston (Single Piston) - 622002C-1

Our signature "Platinum Series" pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley...

Manley Subaru WRX/STi (1.050/.755) 16pc Titanium Retainers (for use with 22180-16 Springs) - 23180-16

Upgrade your valve train with Manley Performance Titanium Retainers and other lightweight titanium options designed specifically for high-revving sport compact engines. Machined from aerospace-grade heat-treated 6AL-4V titanium, these retainers...

Manley Subaru WRX/STi (1.80/.870) 16pc Titanium Retainers (for use with 22185-16 Springs which ar - 23185-16

Upgrade your valve train with Manley Performance Titanium Retainers and other lightweight titanium options designed specifically for high-revving sport compact engines. Machined from aerospace-grade heat-treated 6AL-4V titanium, these retainers...

Manley Subaru WRX/STI (EJ20/EJ25) 16pc Valve Springs (1.126/.640) (For use w/ 23185-16 Retainers) - 22185-16

Engineered for today’s high-revving sport compact engines, Manley valve springs deliver exceptional durability, precise control, and consistent performance. Manufactured from premium alloys and designed for demanding turbocharged and naturally aspirated...

Manley Subaru WRX/STI (EJ20/EJ25) Valve Springs (1.126/.640) *ONE SPRING*16.35 - 22185-1

Engineered for today’s high-revving sport compact engines, Manley valve springs deliver exceptional durability, precise control, and consistent performance. Manufactured from premium alloys and designed for demanding turbocharged and naturally aspirated...

Manley Subaru WRX/STi .490in Valve Spring and Retainer Kit (w/o Valve Locks) (16 each) - 26185

Manley Performance Valve spring and Retainer Kits take the guess work out of making your valvetrain race-ready. Engineered for maximum durability, stability, and precision in high-performance and racing applications, these chrome-silicon alloy springs...

Manley Subaru WRX/STI 16pc Valve Springs (1.050/.755) (for use with 23180-16 Retainers) - 22180-16

Engineered for today’s high-revving sport compact engines, Manley valve springs deliver exceptional durability, precise control, and consistent performance. Manufactured from premium alloys and designed for demanding turbocharged and naturally aspirated...

Manley Subaru WRX/STI EJ20/EJ25 5.216in Center to Center H-Tuff Beam Connecting Rod Set - 15036-4

When it comes to H-Beam connecting rods, not all are created equal. Manley's H-Beam Series stands out as a superior choice, offering exceptional quality at an economical price point. These connecting rods are meticulously crafted to meet the same...

Manley Subaru WRX/STI EJ20/EJ25 5.216in Center to Center H-Tuff Beam Connecting Rod Single - 15036-1

When it comes to H-Beam connecting rods, not all are created equal. Manley's H-Beam Series stands out as a superior choice, offering exceptional quality at an economical price point. These connecting rods are meticulously crafted to meet the same...

Manley Subaru WRX/STi Valve Spring and Retainer Kit (w/o Valve Locks) (16 each) - 26180

Manley Performance Valve spring and Retainer Kits take the guess work out of making your valvetrain race-ready. Engineered for maximum durability, stability, and precision in high-performance and racing applications, these chrome-silicon alloy springs...

Manley Super 7 Degree Valve Locks (.3415) Conventional - Set of 16 - 13084-16

Manley Super 7 Degree Valve Locks (.3415) Conventional - Set of 16