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WPI M57 Connecting Rods

WPI M57 Connecting Rods

Regular price $1,749.00 Sale

These 4140 steel connecting rods are an exact replacement for stock M57 connecting rods with factory pistons. Made 100% in house on our cnc's with Ampco-45 small end bushings supplied by PPP Center. They are designed to be the strongest rods available and hold in excess of 1000hp.

The bolts included are 3/8"-24 x 1.5" manufactured by ARP in their 2000 alloy. Bolt torque spec is .0055-.006" stretch or 55lbft with ARP lube if a stretch gauge is not available. 

Rod dimensions are 136mm center to center length, 30mm wristpin, and 48mm big end. 

Weigh matched to +/- .5 gram per set total and end weights. Total weight per rod with bolts is ~703g, OEM BMW rod with bolts is ~670g. 

FEA analysis image is for a 35K lb load applied to the connecting rod which corresponds to ~4075psi cylinder pressure.