fluxwrap,

We are currently seeking third party partners that are looking to have dyno runs before/after the Soul Performance Valved Exhaust. That said, we have designed the x-pipe using known and proven techniques and conservatively estimate 15-20WHP and a similar amount in torque. If you look at the photo I've attached, you can visually see the major differences in tubing diameter and design vs. stock.

If you compare the placement of the valves on the Soul Performance Exhaust vs. the competition, you will see that the Soul Performance Exhaust flow is better optimized to create a larger difference between "loud" vs. "quiet" mode. No worry that your car does not have PSE, it is ready to accept the Soul Performance Exhaust with no special modification.

Send me an email at evan@soulpp.com for early adopter pricing.