EVP Can-Am Defender Race Bypass Pipe | 304 Stainless Steel High-Flow ExhaustUnleash the Power. Lower the Heat. The factory header pipe is one of the biggest bottlenecks in your Defender's exhaust system. The Evolution Powersports (EVP) Race Bypass Pipe is a direct fit replacement engineered to eliminate that restriction, freeing up horsepower and substantially lowering exhaust temperatures. Whether you're working the farm or hitting the trails, this pipe is a must have for any performance minded Defender owner. Performance