ive got a 3 in straight through angled exit titanium exhaust by attain. its beautiful and well made i love that thing. it sounds EXTREMELY mean on the freakin ka but ive yet to hear how loud it is with a boosted car since i havent boosted mine yet... it is however what you can get for the loudest type of exhaust with a muffler. My car at idle with that exhaust on a stock header stock cat stock ka24de sounded louder at idle than it did before the thing at like 3000
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