Corsa 15-17 Ford Mustang GT 3.0in Inlet / 4.5in Outlet Tip Kit For Corsa Exhaust Only. CORSA Performance Pro-Series tips are dual-walled stainless steel. The dual-wall is designed to protect against heat distortion and maintain visual appeal. Each tip is adorned with high-definition, precision laser engraving that provides unmatched detail. CORSA Performance tip kits are designed to fit directly to CORSA exhaust systems.