Our exhaust systems are designed and manufactured to enhance the sound, appearance and most importantly, the performance of your vehicle. All systems are designed in house using the OEM mounting points to ensure smooth fitment every time. ---2.2" Bore Throughout With Twin 3" Tailpipes ---Full TIG welding for strength and durability ---Manufactured from mandrel bent T304 grade stainless steel ---Cat back system designed to get the most from the 1.8 GTI engines ---Engineered to improve throttle response and increased power and torque across the entire RPM range Compatible with: Volkswagen Golf MK4 1.8T 20V GTI 1997-2004 models Please Note: This system is designed to sit under the bumper for models without a cut-out.