I have an Apex'i Dunk cat back. Would it affect my performance if I had multiple exhaust leaks. There is some kind of rattling around the stock header/downpipe around 3000rpm because it was custom done to fit my jdm h22 header to the h23 downpipe. Also, when I installed my catback, I never had the gaskets with it. TIA.
Re: Does exhaust leak affect performance? (ophdeheezy)
it depends on the size of the hole in your exhaust. My brother had a leak in his exhaust on his civic and the car was a dog, i'm pretty sure it has something to do with back pressure. So he got it fixed and his power is restored.
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