Fits 997.1 and 997.2 GT3 & GT3 RS models. - 2 1/2" (63.5mm) tubing with tips. - Weighs 8.8 lbs. (4,0 Kg), 11.2 lb. savings over stock GT3 center muffler. - Made of T 316 stainless steel for improved durability over T 304. - Includes all necessary clamps and mounting brackets. - Made in Germany. - Intoxicating growl at idle, partial throttle and wide open throttle. - No interior resonance or drone. - No ECU software is necessary. - Does not alter emissions, 50 state legal in the U.S.