I have a jdm b18c gsr motor, and I have low compression (120 psi) in the #3 cylinder....I was planning on just upgrading my pistons along with the rings since I have to take them out anyway.

My question is should I get the CTR pistons or the ITR pistons, I want an all motor setup with higher compression. I heard that the CTR pistons have higher compression, but I want to make sure I don't have to any specialty work since I am using different pistons.....Any advice is appreciated.