GPP engineers utilize proven, compact, high-flow straight-through, Racing Sport muffler canister and extra large 304 stainless-steel mandrel-bent tubing; 80mm (3.14”) diameters for turbocharged vehicles and 76mm (3.0”) normally-aspirated race applications. The RS-RACE systems offer our most aggressive sound quality. The RS-RACE even features our proven removable Tri-bolt tip mounting system to allow for customizing the systems with a variety of optional Titanium or Stainless-steel tips and unique large diameter RS silencers to further control sound.