The goal is to achieve a great sound, increase midrange power (where you do 98% of your riding), and eliminate throttle hesitation. Our products address all these areas in a "Do It Yourself, Bolt In Device" that works throughout the entire midrange power band to give you a "You Can Feel It In The Seat Of Your Pants" performance kick. All this and a Killer Sound Too! Thunder Monsters with our patented Step Flow Anti-Reversion Technology were proven by independent dyno tests to produce up to 12 midrange horsepower and 14 ft lbs of torque over a straight pipe with no baffle depending on your bike and the way you have it set up. Additionally, they showed substantial improvement over a standard baffle. Cam Basics - Selecting the right cam shaft Understanding Exhaust: The How and Why HOT BIKES - May 2006

All exhaust pipes have their own unique design characteristics, especially in the areas of sonic and thermal pulses, as well as how they deal with flow, back pressure, reversion, etc. The ultimate goal is to create the proper amount of back pressure, diminish reversion, and create a sound that is loud but not obnoxious. A deep, clear, throaty rumble is the most sought after sound. While standard baffles attempt to deal with these issues they generally return less than desirable results, particularly in the area of sound. Removing or cutting the baffles in length may seem to give more sound, it is usually not a deep, crisp sound but a higher, blatty, brassy sound. When baffles are removed or cut down the midrange performance and torque are diminished. Performance can drop by 8+ hp and torque by 10+ ft lbs. This can also create a throttle hesitation which is a symptom of fuel standoff. Trying to compensate by tuning the carburetor or adding more cubic inches will not remedy these issues.

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