Anyone running these?

www.portermufflers.com

My Dad just bought a set for his 69' Cyclone but I have yet to hear them. He says they are very well built and heavy walled.

I'd be interested to know what core diameter & design they are built with. There's nothing on their website that details that info. They look like good quality. No, I've never heard of them before either.

They do have this

http://portermufflers.com/whats-the-difference/

Still no mention of the size but a bit more info.

I put a pair on my 59 Dodge truck. It has a 68 383 w/headers. The Porter 2-1/2" in & out are mellow when cruising and have a nice glasspack type roar when accelerating or at full throttle. I like them so far, but would prefer more tone at idle and cruise. Should maintain tone forever since they are packed with stainless steel rather than fiberglass.