I vote for EP.

 

EP1 is a good chunk quieter than the GMG, I got a ride in the GMG car in 2008, not sure if they changed the exhuast so just an FYI. Not that the EP1 is lacking in the sound department, I love it.

Another very nice sounding one if you love the NA sound if the BBI which can be customized for the owners needs. I thought it sounded pretty good and its hand made in house.

 

They are hre 895r's. you have to either rescue the tpms you have now or get new runs and sync it to your Porsche

Edwin