Depending on what gasket you'll be using but it's somewhere from 12:1 to 14:1 CR. It's rollerwave compression expansion. Check out Endyne website for their application. Also check out this website http://www.c-speedracing.com/integra.php . These pistons are most slept on pistons on the market. For all motor setup, Endyne is the best thing out there for sure.