Manley Turbo Tuff Series Crankshaft 79mm Subaru WRX / STI EJ20 / EJ25 2002-2021

Part #: 190040B. Manley Turbo Tuff Billet 4340 Subaru crankshafts are ideal for building a robust bottom - end. They go through a multi - step heat treatment, get nitrided for top - notch strength, then are stress - relieved, shot - peened, and magnafluxed. The center, crank pin, and counterweights are gun - drilled to cut down on weight. Each crankshaft has knife - edged counterweights for perfect balance and low rotational mass. Specs: 1. Ideal for high - horsepower and high - boosted applications, made of 4340 billet. 2. Undergoes a multi - step heat treatment process. 3. Nitrided, stress - relieved, and shot - peened. 4. 100% magnafluxed. 5. Features knife - edged counterweights. 6. Crank pin and counterweights are gun - drilled.

Using this Manley Turbo Tuff crankshaft is straightforward. Just install it in your Subaru WRX or STI EJ20 / EJ25 engine according to the standard engine assembly procedures. Make sure to align it properly and torque the bolts to the recommended specifications. When it comes to maintenance, keep the engine well - lubricated. Regularly check the oil level and quality, as good lubrication is key to the crankshaft's longevity. Also, inspect for any signs of wear or damage during routine engine checks. Avoid over - revving the engine, especially in high - boost situations, as this can put excessive stress on the crankshaft. If you notice any strange noises or vibrations from the engine, have it checked by a professional right away.