so ive got a 91 acura integra 4d, and well my first problem is it an automatic and its "thunking" out of first gear under "hard" acceleration, i thought it was a motor mount but i just replaced those and its still doing it.
second, i had all new exhaust installed at a local shop with a new muffler and cat. but anything over 4k rpm it sounds like a rattling, i figured its the stock flanges with the springs on them, cuz it was going it b4 the exhaust swap also.....if i replaced them with a flex pipe, would it take care of the rattling in the exhaust?