owen meany

I've searched here and found some info but would like some more if it's out there.
My tt has "sport" exhaust on it from the previous owner who did an andial style rebuild to 3.8. the shop said that they put "sport" exhaust that is a little larger diameter. Anyone know if this would be an Andial product?
I'm looking at buying the techart exhaust. Does anyone have an opinion as to whether or not it will sound much different? Will it save any weight? Seller suggests a horsepower bump but others here say no. That's not too much of a concern for me. I'd love a little nicer note out the pipe.
Thanks so much.