I just got it on Sat. and MAN! What a dif. over stock! I have had a Bonez MP on my Black 88 T2, but when I added a single pipe back to the single SS 3A Racing muffler the thing reved much quicker & much more torque down low in the revs too! Its louder sure, but it has a nice mellow tone that isn't too loud. (At least for me!) ha ha...Whatever muffler you choose, I think this single setup is a good way to go, and cheaper! I paid $100 for my muffler and another $100 for the exhaust work & pipe. Cheap good HP! It did bring the beast out of this T2! I love the growl it now has!
Happy motoring guys!

 

Hmmm, sure beats the dual setup on my car that ended up costing $1200 with labour!!! But damn, I like dual much better.

 

Yes, I know what you mean, I use to love to see 2 streams of exhaust vapor coming out when it got cold out when you first drove your car. But now, I feel its a much better design, almost straight back to the passenger side! Smooth flow, while also being much lighter! But I am glad you like your setup, thats what counts!