Porsche Cayenne Turbo 958.1 2011-2014 Cat Bypass Pipes +17-20 HP Brand NewLooking for a fairly inexpensive way to add 17 20 horsepower to your high performance Porsche 958 Cayenne Turbo 2011 2014? Well, you've come to the right place. Here's the deal: Fits all 958 Cayenne Turbo Vehicles 2011+ +17 HP on V8 platform. 14 16 gauge, C. N. C. mandrel bent, polished T304 stainless steel tubing for maximum flow and improved power. All V8 Cayennes have two sets of catalytic converters. The second set is unnecessary and only used to