Originally Posted by OMG37

you mean with a non-stock exhaust, since it already has it's own SC intake with the kit.

So far the only thing Sam hasn't given you is a stage 2 or 3 dyno with any sort of HFC or catback exhaust modifications to the car...it's purely been stock.

Stage 2, Stage 3 tuning is currently under development and test and you probably won't see dyno's with non-stock parts from GTM until those are finished. But I'd have to ask Sam this question specifically to know if that is true or not...I just know what he's working on now and it makes sense to continue with that work first before beginning to switch out stock parts and tuning with that setup.