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Originally Posted by s_jo4
from time to time i keep hearing that if you bypass cats/mufflers and run practically straight flow through that you could see a decrease in power because you have too little backend pressure, so what's the truth
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you will have less torque because u need a certain amount of back pressure for torque. But you will have a gain in high end horses simply at high rpms and high engine strain, it is best to get rid of exhaust pressure as fast as possible
but thats describing and explain briefly