If you truly want to build your project with the best possible parts available, buy EVO. They not only build with the best materials they test and test to make sure you are getting the performance gains they say you will but that the mods will be safe and keep the reliability of the machine as high as possible. Thanks again to both Jim and Todd. Keep it up guys!Evolution Powersports has a reputation of the utmost quality and attention to detail on every product they design. From within the industry and outside, I have heard nothing but great things about this company and my experience has been the same. If you are looking to make more reliable power this company can get you there. Both customer service and product design are top notch and they stand behind their work!
Constructed of stainless steel for durability, our slip-on flows much better than stock while giving your vehicle an aggressive look and sound without being too loud.My car is absolutely insane. LOVE it. Thank you for everything. Zero issues and even in 95 degree ambient it’s not over heating dining or anything. This power dining is 100% perfect. Car is a beast. You guys Rock! – Dynomite Turbo Kit
EXO Stainless is the most durable exhaust in our lineup. Constructed of high-strength 304 stainless steel from front to back, EXO Stainless is sure to withstand even the most brutal of riding conditions and use. We took the original EXO Series and swapped out the aluminum muffler for a stainless muffler, replaced the aluminum base plate with a TIG-welded stainless steel plate and added a trick looking stamped stainless badge to top it off.When we refer to proper tuning, we are referring to adding enough fuel to compensate for the added airflow. In doing so, this will allow you to eliminate the lean issue and bring your motor back up to having a proper air/fuel mixture.
Big Gun exhaust systems are warranted against manufacturing defects for material and workmanship for 1 year from the date of purchase from Big Gun or from any authorized Big Gun dealer, distributor, or exporter. During the warranty period, the warranty is limited to the repair or replacement of defective products. The warranty shall be void if the exhaust has been mounted on a vehicle and run, or it is determined that any alleged defect is the result of misuse, neglect, abuse, or modification of the product. There is no warranty for how the exhaust sounds (i.e. too loud), normal wear and tear of products, or for any damage that may have come about from a crash, or from improper maintenance of the muffler and/or packing. There is no warranty on exhaust with regard to any form of discoloration or bluing which are caused by tuning characteristics (i.e. cam timing, carburetor jetting, over heating due to lack of packing and incorrect fuel/air mixture) and is not caused by a defect in manufacturing.Every model is different and will require different jetting specs according to various factors like altitude, the exhaust system that you have, air box modifications and the use of aftermarket air filters.
Since it is nearly impossible to have exact jetting specs for every model while taking into account the various different potential setups, we have made a great effort to have jetting specs for as many models as possible. Please call us to find out what specs we have determined for your particular model.All Big Gun Exhaust mufflers come with the highest quality high-temperature fiberglass packing inside. Repacking your muffler every 15 – 20 hours of ride/drive time is required. Failure to properly check and repack your muffler as required will void the warranty. A muffler with little to no packing will have nowhere to dissipate the heat of the exhaust. Signs of packing deterioration can include: increase in overall sound, discoloration of the muffler and end tip, peeling and/or discolored decals/badges, a slight echoing and loose rivets or screws.We recommend taking it to a certified mechanic or someone that you feel comfortable with working on your vehicle. Don’t let not knowing how or not feeling comfortable installing a controller be an excuse to not properly tuning your vehicle.The aftermarket exhaust is designed to allow more airflow to pass by significantly less restricted than the stock muffler does. Also, generally the mid pipe and head pipes of most aftermarket systems are larger diameters than stock which allow for added airflow to pass through quicker. This changes the air/fuel mixture that is set up for the stock exhaust system.Our boxes are designed as plug-and-play units that plug directly in line with your stock injector harness. The plastic clips on the ends of our Power Box wiring harnesses make it easy to unplug your stock harness and plug our clips directly in line. The only other thing aside from routing the module to your desired location would be hooking up the ground wire; usually the best place being the battery.
This is an incorrect assumption. Just because your stock exhaust system has an O2 sensor in it does not mean it is self tuning. The stock O2 sensor is an emissions compliant component that keeps the vehicle running at 14.7 AFR (which is lean) only during light engine load conditions. The O2 sensor makes the vehicle run lean during idle, low RPM and steady cruise. The O2 sensor does not function under engine load (acceleration & full throttle). By eliminating the O2 sensor, we are able to richen up the low end with our TFI Power Box and then fine tune the fueling for acceleration and full throttle now that the performance mods (exhaust) have been added. By eliminating the O2 sensor and correcting the fueling, the vehicle should run cooler, have improved low end torque and overall smoother drive-ability.Proposition 65 requires California to publish a list of chemicals known to cause cancer, birth defects or other reproductive harm. This list, which must be updated at least once a year, has grown to include approximately 900 chemicals since it was first published in 1987.