Invidia N1 Dual Catback Exhaust For Scion FR S & for Subaru BRZ FRS BRZ GT86 Invidia N1 w Catless UEL Openflash Header Sounds Invidia Exhaust Kits & Upgrades Aftermarket Car Exhaust Systems In Invidia 12 Scion FRS BRZ 60mm N1 Ti Tip Cat Back Exhaust Invidia N1 with Invidia Catless Front Pipe Scion FRS and Subaru BRZ Toyota GR86, 86, FR S and Subaru BRZ Forum & Owners Community. Description: N1 Exhaust Piping: 60mm Tip: 101mm Tip Style: Single Layer SS For a good balance of price and performance, Invidia offers the motorsport enthusiasts a strong line up of Invidia N1 Exhausts. Each Invidia Exhaust is constructed with high quality SUS304 Stainless Steel, CNC machined flanges, and manufactured with a polished finish. Each system features mandrel bent stainless steel piping for maximum exhaust flow and reduced back pressure. These exhausts are engineered to produce strong mid to top end power gains, as well as an increase in horsepower and torque.