Give your Porsche (991) the luxurious style it deserves with the aFe POWER Mach Force-XP tip upgrades for the 2012 - 2016 Porsche 911 C2S with the H6-3.8L engine. Realizing that the OE exhaust tip could be improved, aFe designed a special quad 3-1/2" 304 stainless steel exhaust tip assembly. Constructed of 3-1/2" brush finished, 304 stainless steel tubing for improved performance and overall breath-taking appearance. High quality clamps and hardware are used, these tips are also manufactured to the OE style, resulting in a perfectly precise fit and a complete bolt-on installation. The tips are 100% hand TIG-welded by certified craftsmen fo r race proven strength and durability that your Porsche demands! No modifications are necessary and all hardware is included within the kit. 3-1/2" dia. Brush Finish Stainless Steel Exhaust Tip: These tips are 3-1/2" dia. brush finished stainless steel exhaust tips that gives your Porsche a clean, breath-taking appearance. Stainless Steel and Construction: This unique tip uses 3-1/2" angle-cut brush finished, 304 stainless steel tubing that is TIG-welded by a certified craftsmen. Hassle-Free Installation: These tips are also manufactured to the OE style, resulting in a perfectly precise, hassle-fee installation fit with no modifications required.