BMW RPI EXHAUST - 5 SERIES F90 M5 (GTM) AXLE BACK BMW RPI EXHAUST - 5 SERIES F90 M5 (GTM) AXLE BACK Description BMW RPI EXHAUST - 5 SERIES F90 M5 (GTM) AXLE BACK    (  POLISHED TIPS) The RPi F90 M5 GTM Exhaust System utilizes our signature straight through design, and for the first time incorporates electronic valves controlled by the factory BMW servos. With the valves open, the system produces the familiar RPi “Bad Boy GTM” sound, with the valves closed, the sound level is on par with stock exhaust sound level. This system was specifically designed to complement the F90 chassis as the new M5 is a beast waiting to be unleashed! Put the M5 into Sport Plus, open the valves with the console button, and maximum performance is at your disposal. Power gains of 10-15 hp from 3.5k to 6k rpm on the full system. Click image to enlarge Images sell! Get Supersized Images & Free Image HostingCreate your brand with Auctiva's Customizable Templates. Attention Sellers - Get Templates Image Hosting, Scheduling at Auctiva.com. Track Page Views WithAuctiva's FREE Counter