Auger mufflers, they slip into the exhaust pipes. Not much to them, I do have to reduce the dia. from 3" to 2 1/2" to fit. It would be nice if they work, I also have mufflers coming this Friday. Between using one or both, I hope this resolves my noise problem.
I've been looking at the idea of taking the car to the local drag strip. There's one about 20 min. from here and they have a test and tune day on Sunday's. This will be my only opportunity to test the engine, gearbox and brakes before my first event in April.