#Thunderheader slip ons harley davidson install

Most вЂњopenвЂќ exhaust systems will produce good top-end HP, however in most cases the torque will suffer because of the lack of exhaust scavenging, due to reversionary problems associated with вЂњstraight throughвЂќ systems.ДЄnother aspect worth discussing is throttle response. You donвЂ™t want to increase HP, at the cost of loosing substantial amounts of torque. When comparing the results, be sure to look at the overall performance, not just the peak horsepower. Be sure to record the torque as well as the horsepower with each test.

Be sure to re-jet for each exhaust system, so you will get the best results possible with that system. Record your test results, then change the exhaust system only, and start your testing again. Horsepower is measured at power peak (the highest RPM which horsepower continues to increase), power peak for most performance equipped EVOLUTION models, is usually between 5800-6750 RPMвЂ™s, depending on the breathing capacity of the engine. Tune the engine to produce maximum HP & torque. The test engine must be equipped with high performance components, such as a cam, ignition, air cleaner & Thunderheader в„ў. The best way to test or compare high-performance exhaust systems is with a Dynamometer.

#Thunderheader slip ons harley davidson install

This means it has to breathe, if you install a high performance cam, carburetor, air cleaner, ignition & exhaust system, you can expect to increase your horsepower about 30-40% over stock, on most HARLEY-DAVIDSON EVOLUTION models. Your engine must have the proper components necessary to produce maximum horsepower output. The addition of a high performance exhaust system alone is not enough to achieve maximum horsepower & torque. Not only will the exhaust system affect peak horsepower, torque & RPM, it also can change throttle response, gas mileage, vibration & engine temperature. The exhaust system has a very dramatic effect on how a engine operates throughout the entire RPM range. A stock cam & air cleaner will limit the performance of your engine, even with a high performance exhaust system installed. If your engine is equipped with at least a high performance cam & air cleaner, your performance gains will be significant. For motorcycles used only for racing, other modications can be considered. For the motorcycle to remain legal for street use, other modications must be limited to those that have been approved by the California Air Resources Board (CARB). How a Thunderheader в„ў exhaust system will affect your engineвЂ™s performance depends on other modifications that are made. Thunderheader в„ў high-performance exhaust systems, are specifically designed for the HARLEY-DAVIDSON V-Twin engine.

Due to these legal restrictions this part cannot be shipped to California.Click Here For Dealer Only Access to Tuning Maps! The Air Resources Board (ARB) does not permit the use of aftermarket emission-related parts that alter the air/fuel ratio of an emission-controlled vehicle. If a jet kit or fuel processor is recommended, see the FUEL/INTAKE section Please consult the exhaust manufacturer directly with questions regarding any modifications that may need to be made during, or after, installing their product. Installation of a new exhaust system may change your motorcycles fuel-air mixture requirements. See the CHEMS/LUBES section for products that will help prevent or remove bluing. Discoloration (bluing) is the result of tuning characteristics, cam timing, carburetor jetting, overheating, etc., and is not caused by defective manufacturing. There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Check your local laws and the manufacturers information Not all products are legal for sale or use on pollution controlled vehicles. In conjunction with the flow director, a diffuser shroud is built into the reverse cone, this patented device is designed to diffuse the air rushing in as the pressure inside of the system becomes equal to atmosphere.The flow director serves a multi-task function: directs outgoing flow through four acoustical dampening chambers creating a spiral motion upon exiting to atmosphere and it also forms a pyramidal shaped anti-reversion trap to minimize the amount of air rushing in.The Collector is designed to direct spent gases through four acoustical dampening chambers.A patented collector is used instead of a conventional baffle in the muffler.Increased horsepower, torque and unmistakable Thunderheader sound.Thunderheader Chrome Thundercone Slip-On Mufflers - 1066