I had a supertrapp on a street bike. They are nice for low CC engines. Nice sound, much different than anything out there. I've never heard them on a truck / car engine before... other than a VW dune buggy.
If you ran dual pipes all the way to the back and put on a pair of these that would be interesting, might work real well. They make larger versions of them for larger engines.
The tunable aspect is VERY nice. Less discs, more torque, more low rpm torque. More discs, more HP, more high rpm power.
I don't know how rugged they are. They might not stand up to a daily driver use.
They're not cheap.
