Invidia N1 Catback Exhaust Impressions & Review 2016+ Honda Civic Invidia N1 Cat Back Exhaust 2022+ Honda Civic Si 1.5T Integra Base (Burnt TI Tip) 2022 Civic Si Exhaust Invidia N1 Exhaust Honda Civic Si Sedan Coupe (2006 2011) Catback w Invidia N1 Exhaust Honda Civic 1.5T Coupe Sedan (16 21) Catback w T Invidia N1 Cat Back Exhaust Titanium Tip 2015 2021 WRX 2015 2021 STI. 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.