Manley Turbo Tuff Series 4340 Billet 79mm Stroke Crankshaft for Select 1996-2012 Subaru/Saab (EJ20/EJ25) - 190040B

Fits select 1996-2012 Subaru Impreza (including WRX/STI), Forester, Legacy, Outback, Baja, and 2005-2006 Saab 9-2X (EJ20/EJ25 engines).

Engineered for high-horsepower and high-boost applications, the Manley Turbo Tuff Series billet crankshaft provides the structural integrity required for extreme performance builds. Each unit is precision-machined from premium 4340 billet steel and features fully knife-edged counterweights to reduce rotational mass and improve aerodynamic efficiency within the crankcase. The gun-drilled crank pins further reduce weight without sacrificing strength.

To ensure long-term reliability under heavy load, these crankshafts undergo a multi-step heat treatment and nitriding process for superior surface hardness and wear resistance. Every 190040B crankshaft is stress-relieved, shot-peened, and 100% magnaflux inspected to guarantee a flawless finish and structural consistency. The inclusion of direct shot oiling ensures consistent lubrication to the rod journals and bearings during high-RPM operation.

• Manufacturer Part Number: 190040B
• Material: 4340 Billet Steel
• Stroke: 79mm
• Counterweights: Fully Knife-edged for superior balance
• Crank Pins: Gun-drilled
• Finish: Heat-treated and Nitrided
• Quality Control: 100% Magnaflux inspected, stress-relieved, and shot-peened
• Oiling: Direct shot oiling for journals