This 2.5" diameter into dual 2" tail pipes Borla(r) Cat-Back(tm) system is tuned for performance and sound for the 2.4L engine in the BRZ and GR86. Our ATAK(r) sound level is designed to bring out the Subaru engine growl and provides an aggressive sound without any drone. This system features single 5" round bright chrome on T-304 stainless steel tips on each tail pipe. A system is also available with black chrome on T-304 stainless steel tips. For ease of installation this Cat-Back(tm) is a direct bolt on part and does not require cutting. Like all Borla(r) exhaust products each system is handmade in the USA by master craftspeople and features premium high-quality T-304 austenitic stainless steel construction. Ultra-smooth mandrel bends ensure maximum flow & power and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all it features a Million-Mile Warranty.