i hav a 92 cx hatch i put in my b16 sir2 over the last two weeks. i have a dc 4-1 header and a magnflow cat back. my problem is the cat was on the manifold so now its gone. i have a test pipe but i cant get a o-ring to fit around the header and into the test pipe. so i have a huge leak. my question is am i losing a ton of power due to this or is this as quick as my car will be after i fix the leak. im goin in next week to get a cat with some custom flanges to make it all work. am i going to get noticeable gains afterwards?