and reliability required when dealing with high-RPM and high-torque engines

With a proven track record on and off the track

or at your next car meet

G40-900 (62mm) and G40-1150 (71mm) You can click the hyperlinks to go directly to those product pages

and ready for any challenge

B58 Billet Main Caps by 5150 AutoSport 11127613127 and reliability required when dealing5150 AutoSport B58 Billet Main Caps As power levels climb beyond 1,200+ horsepower, we've seen factory main caps begin to walk. Under extreme cylinder pressure and crankshaft loads, even the slightest cap movement can affect main bearing alignment, oil clearance, and ultimately bearing life. Our CNC machined billet steel main caps are heat treated for maximum strength and feature a dowel pinned design to positively locate each cap and virtually