Product made by STR to increase engine power and save some weight. It also increases ground clearance. Sound volume change: 77.0db @ 600rpm (vs 59.7 OEM), 106.7db @ 4500rpm (vs 83.3 OEM) & 109.1db @ 5000rpm (vs 86.4 OEM).
STR (Speed Tune Remodeling) is a company that was established in 2000. They go to race events with their BRZ and always try to improve the vehicle by designing new parts. Their parts are made to survive big abuse.