1987notchback
XS650 Member
hey guys have some questions on the exhaust that i am buiding. the exhaust pipes are 1 5/8" OD and 1 1/2" ID. my problem is i want to use small mufflers to quiet it down but i want to build them within the pipes so they still have the straight pipe look. i have made a few test pieces to see what will work. my main question is how small/large should i keep the smallest id on the muffler without restricting the exhaust to much. i will be using fiberglass muffler baffling/packing and not to state the obvious but the smaller the id on the exhaust is the more packing i can use and the less the larger it can be. so what size id should i try to stay with? thanks mike
