aFe is proud to introduce the aFe ELITE cat-back exhaust system for the 2005-2012 Porsche Boxster S (987.1 & 987.2) with H6-3.4L engine with aFe dual tip assembly. In recent testing with the aFe dual tip assembly, this exhaust system resulted in a max gain of 29 horsepower and 40 lbs. x ft. of torque. aFe spent countless hours of R& D to develop the perfect balance of pure, race-inspired performance and in-cabin driving comfort and excitement of exhaust sound and tone during normal cruising or aggressive hard throttle. Realizing that the OE exhaust tip could be improved, aFe designed a special dual 4" polished, aFe laser-etched, 304 stainless steel, slash-cut exhaust tip assembly that is more free-flowing that the stock tip assembly. This exhaust system comes with a brushed finish and is 100% Hand TIG-Welded for a perfect, precise fit and a complete bolt-on installation. No modifications necessary. MACH Force-Xp 2in to 2-1/2in Stainless Steel Cat-Back Exhaust System Porsche Boxster S (987.1) 05-06 H6-3.4L 2" to 2.5" Step Design; Resonance Chamber; 4" Dual Polished 304 Stainless Steel Assembly; Dual 304 Stainless Steel Race Mufflers; Brushed 304 SS Construction; Balance Equalizer Tube; Race Proven Spring Hook Connectors; Bolt-On Installation ; No Modifications Necessary Porsche Boxster S (987.1) 05-06 H6-3.4L