SRT engines have become iconic for their sheer power, performance, and engineering excellence. But what makes them so ...

The compression ratio was also increased from 9.6:1 to 10.3:1, with all of these changes resulting in an engine robust enough to handle 425 horsepower and 420 pound-feet of torque.

In this Hemi engine swap guide we explain everyhting you need to know to install a late-model 5.7L or 6.1L Hemi engine into your early ... 9.6:1. 10.3:1. Combustion chamber. 84.5 cc. 71.5 cc ...