old school

Thrush, even back then, used to be some of the cheapest crap on the planet. (Maremont) Cherry bombs were MUCH more heavily built and better quality.

One of my favorite true stories is I had ORIGINAL replacement Maremont/ Walker "turbo mufflers" and BY THAT I do mean exact replacement Corvair turbo mufflers on my old Landcruiser. Someone I know proudly dragged in his Thrush backflow mufflers. I dragged out a stock Maremont turbo, and held his Thrush out on one arm with my arm extended, and told him to try that with the Maremont. He was no weaky, and could not do it.

I'll bet the Maremont replacement was THREE times heavier than the Thrush.

Junk. pure junk. If you like replacing a lot of mufflers, use 'em