Do not know bout a good one but do know bout a BAD one, cherry bomb glass pack. Bout 25 yrs. back runnin 14bs in gravel pit. Rear muffler on one rusted off, so they went 3 miles up the road to NAPA and got cherry bomb and fabbed up a temp setup

Talk about finger nails on a chalk borad, loud ones to boot!! The kid runnin it thought it was great to get off the rear and let the jake kick on when passin anyone. He soon got told where that cherry bomb was goin get stuck if he did not mend his ways!

P.S. That temp fix was still on it 18 months later when it left.