The FX Motorsports Development crank is machined from a block of 4340 billet high nickel steel. The crank has generous rolled fillets for strength and cross drilled oil passages.
The crank is shot peened and has the oil holes chamfered and teardropped. The bearing journals are micropolished and the crank is WPC treated for fatigue strength improvement and friction reduction. The crank uses the stock 78mm C32 stroke.
The milky texture of the bearing surface is the result of the WPC treatment. You can see the generous chamfer of the fillets at the edge of the journal. The fillet is important for the long term durability of any crankshaft.
