Developed and tested to increase performance throughout the entire rpm range Headpipes are 1 3/4" and flow into 2 1/4" muffler bodies Hidden crossover system improves scavenging for more horsepower and better sound Come complete with fullcoverage, fulllength heat shields for a virtually blueproof appearance With heat shields installed, pipes have a burly 2 1/2" look Replacement front and rear heat shields available; sold separately Feature an embossed Python logo on rear pipe and removable baffles All required mounting hardware and instructions are included