Mk II Exhaust system upgrade?

So that really cool looking low profile of my Mk II is great, but speed bumps have finally wrecked the exhaust system. I was considering a low back pressure upgrade short of “glaspacks”, as they were called in my youth. I cannot recall ever seeing that subject discussed, although I am sure it is me, not all of you, that have not thought about it. Any solutions that anyone is particularly happy with would be much appreciated! And again, Mike Eck, that clock rocks!