Porsche 997.2TT Exhaust Finishing Up! Dan Mermelstein August 12, 2010 AP Media, Tuner Life Agency Power just finished up our first Porsche 997.2 exhaust and will be putting it in production starting next week. Take a look at our first photo and the video that was shot on Vivid Racing’s dyno. The Agency Power 997.2TT exhaust not only saves about 30lbs off the rear end, it also improves power quite a bit by putting down an extra 15awhp and 23ft/lbs of torque on the Mustang Dyno. The exhaust tested below is made with 200cell high flow cats with a single can muffler, allowing you to use your stock exhaust tips. If you are interested in this exhaust please email Ryan@Agency-Power.com or call at (480)921-7422 x.247 to be contacted about details on future ship dates and pricing.