I Beam 6.385" 2.200" .990" 5140 Connecting Rods Chevy BBC 454 w/ ARP 2000 These Speedmaster tailshaft housings are

These Speedmaster tailshaft housings are designed five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy

they are made from 5140 Chromoly steel

They're made from quality materials

Speedmaster billet main caps are precision CNC-machined from superior-quality 1025 billet steel

I Beam 6.385" 2.200" .990" 5140 Connecting Rods Chevy BBC 454 w/ ARP 2000 These Speedmaster tailshaft housings areThese Speedmsater I beam connecting rods incorporate all of the best features possible for an I beam rod, including some strength adders found in H beam designs. Speedmaster I beam connecting rods are profiled with clearance for long stroke applications. These connecting rods feature a one rib cap design for added strength and bearing support, polished beams to eliminate stress risers.