Invidia N1 Cat Back Exhaust w Ti Tips Subaru BRZ & Toyota 86 12 21 Invidia N1 Cat Back Exhaust 2022+ Honda Civic Si 1.5T Integra Base (Burnt TI Tip) Invidia Single N1 Cat Back Exhaust w Ti Tip Subaru WRX VB 22+ Invidia N1 Exhaust Honda Civic 1.5T Coupe Sedan (16 21) Catback w T Invidia N1 Single Exit Cat Back Exhaust Honda Civic FC FK 16 20 1.5T Invidia N1 Cat Back Exhaust for 2012 2015 Civic Si Models. For a good balance of price and performance, Invidia offers the motorsports enthusiasts a strong line up of Invidia N1 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 sxhausts are engineered to produce strong mid to top end power gains, as well as an increase in horsepower and torque for your 2022+ Honda Civic Si 1. 5T Integra Base Piping diameter 70mm Tip diameter 101mm For Off Road Use Only.