Teach me about exhaust

[PbFut]

This may sound harsh but here goes. It sounds like you may have a lot more problems than worrying about configuring an exhaust I'm sorry to say. Take a step back and see that your motor is self destructing for some reason. Find that reason first and fix it. As for exhaust, kwmech provides the best advice on the thread. Its a street truck. Configure and use accordingly. If you want a race car, buy one. You can't properly duel purpose either.