I'll be putting a pair of Spin Tech mufflers on one of my other cars soon.
Just wondering if anyone has tried them on a Mini, or other 4 cylinder engine ? Per a sound, air flow, body size chart that I was given, they seem to flow better than most mufflers. Offered in many sizes.

Mike

 

Looks like an interesting idea… reminds me of a Tesla flow valve. Can’t say I’ve seen those before, let alone seen them used on a Mini, but that doesn’t mean much. I’d be curious how it will sound.

 

Yea, they've been around for some time. Just guessing, but I'd say the first that I saw of them was bout 30 years ago..
They don't do much advertising for some reason.

Mike