12a Exhaust system MGB GT
 

Hey guys I am about to build an exhaust system for my 1972 MGB GT with a 12a swap, and I have some questions. 1)Would it be beneficial to make a long exhaust system over a short one? 2)I want to drive this car so should I use two presilencers or one?3) Where can I find a good muffler? 4)what thickness of metal should I use for the header plate? 5)Would .120" mid steel tubing 1.8" OD work for my exhaust tubing?


thank you!