Originally Posted by Locomotion
Eagle SIR small block rods have 3/8" bolts and made from 5140 steel.

Scat I-beam small block rods have 7/16" bolts and made from 4340 steel.

The Eagle SIR isn't a bad rod when used in the right application and the Scat is a little bit heavier, but the Scat has more advantages and would be my choice.
It's always best to keep piston weight down.



What he said....

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)