Ripple Rock Racers new RRR/Hindle SS Systems are developed to produce maximum horsepower and maximum torque with our 4-2-1 Design. The System comes in 2 configurations, a race version which is side stand only and a street version that allows retaining the stock center stand. Either system is fully spring mounted as per the best race systems. Our super thin wall stainless steel construction is strong, extremely durable, rust free and super light. The complete system with muffler weighs only 10 lbs. These systems come as complete systems with a choice of 12” or 16” Megaphone Mufflers. Either size muffler can be had with a classic tip or the slash/cut reverse cone tip. The systems are also available as “headers only” which is complete less muffler. The megaphone mufflers are tuned to work with our headers and provide a deep rich sound, the 12 inch is a bit louder than the 16” but either is fine for street use anywhere. Note – to see the RRR/Hindle Megaphone Mufflers go to that section on my website. It may help you determine which muffler length and tip (end cap) you would prefer as these are the muffler choices supplied with each system.