Manley Subaru EJ20/EJ25 4340 Billet 79mm Stroke Turbo Tuff Series CrankshaftManley Turbo Tuff Billet Crankshafts deliver uncompromising strength, precision, and reliability for high horsepower and high boosted applications. Machined from premium 4340 Turbo Tuff billet material, each crank features gun drilled pins and fully knife edged counterweights for reduced weight and superior balance. A multi step heat treatment and nitriding process maximize durability, while stress relief, shot peening, and 100% magnaflux inspection
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