KTM/HUSKY/GAS GAS 450 exhaust flange 12.5 - 2025 Austrian brands 450/501 CNC machined from titanium with a weight 2.5 oz or 72 grams with a net weight savings of 1.9 oz or 55 grams over OEM. Flange is shaped to match the exhaust port allowing and un interrupted exhaust gas signal back to the engine. Provides a more responsive and connected feeling of the engine to the throttle and a slight power increase felt through the rpm range. Designed to have a tighter tolerance with head pipe to further prevent exhaust leaks and galling of flange to titanium exhaust headers. Can be used with any exhaust system, no change in mapping is required works with all OEM parts, gasket and exhaust springs. Ultimate factory piece used by top AMA SX/MX pros and vet riders.