So the pistons I bought ended up being a hair too small..I had too much clearance, and ADC helped take care of the problem ASAP. In fact they called me like 3 times to make sure we got it all sorted out. What can I say...they are the best. I would highly recommend them to everyone...even if you don't don't have a contour...Any domestic pretty much, and I know they know their stuff about WRX, Lexus, and I am sure many more.