Q. Are SuperTrapp exhaust systems approved by the Forest Service?
A. All SuperTrapp exhaust systems have spark arrestors and are U.S.F.S. approved.

Q. How do the diffuser discs work?
A. SuperTrapp exhaust system allows you to adjust or "fine tune" the sound level, power band and performance. SuperTrapp's exhaust outlet is formed by a precise gap between a series of individual discs. Adding discs increases the size of the exhaust outlet, increases exhaust flow and exhaust tone while reducing backpressure. Removing discs decreases the size of the exhaust outlet decreases exhaust tone and exhaust flow while backpressure is increased.

Q. How many diffuser discs should I run?
A. To assess the performance of any product that affects horsepower and torque, lap times and dyno-runs are the best indicators. However, since enthusiasts usually only have a "seat-of-the-pants" dyno, running condition is the most obvious indicator. Attention should be paid to the coloration of the discs. Little or no disc coloration would indicate a possible lean condition, while black or sooty discs are indicative of a rich or oil burning condition. Discs that turn a tan or golden color would illustrate an acceptable balance of fuel mixture and exhaust flow.

Q. Will removing the packing material increase performance?
A. Generally speaking, no. For instance, a firmly packed SuperTrapp exhaust equipped with a 2-1/2" diameter core will maintain the same flow characteristics as the 2-1/2" diameter exhaust tube that flows into it. However, if the material surrounding the perforations of the core tube is removed or severely worn, this allows the exhaust to flow in and out of the perforations. This in-and-out movement introduces unwanted turbulence into the exhaust path, consequently, this can harm the flow and performance.

Q. Do I need to rejet?
A. Rejetting is suggested but is not required.

Q. How often do I have to re-pack?
A. You might want to consider re-packing when you notice your exhaust is getting louder. SuperTrapp's IDS series and Kerker's Performance Series both are packed with a newer, better performing product known as Silent Sport. If you are repacking an older pipe, you might want to consider using Silent Sport. This will provide a slightly deeper sound and lower volume.