aFe MACHForce XP 304 Stainless Steel Polished Exhaust Tip 3.5in x 4.5in Out x 12in L Clamp On Sustainable corporation development, CO2 reduction and Carbon Net zero. aFe MACHForce XP 304 Stainless Steel Polished Exhaust Tip 3. 5in x 4. 5in Out x 12in L Clamp On aFe is proud to introduce the aFe dual tip upgrade for the 2013 2014 Porsche Cayman S Boxster S (981) with the H6 3. 4L engine. Realizing that the OE exhaust tip could be improved, aFe designed a special dual 3. 5" polished, 304 stainless steel exhaust tip assembly than is more free flowing that the stock tip assembly. This aFe tip assembly 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 304 Stainless Steel Clamp on Exhaust Tip Polished 3 1 2 IN Inlet x 4 1 2 IN Outlet x 12 IN L