On my 70 I have some Thrush Turbos...they're cheap, sound great at a idle, very throaty, but when crusing they are as quiet as a regular muffler. It's great, I used to have to yell and my passenger while doing 70, now we can almost talk normally! Of course before the Thrush turbos, I had to two old glassbacks that were so burnt out it was like running straight pipe!
