1 KIT IS FOR THE ENTIRE BIKE. --- Replaces air pumps, air valves, and associated hoses with 2 or 4 small aluminum plates, made 6061 Aircraft grade Aluminum. Benefits Eliminates Backfiring Removes Engine Clutter Reduces Weight Lower EGT's out (exhaust gas temperatures) Kit Includes Aluminum Block Off Plates Specific to your Bike Lock Washers Step by step instructions with photos. Installation Support - If you need assistance with installation or have a question we are there for you. We can also send instructions in any language, just request it. AIS Defined The manufacturer uses clean air injection that adds oxygen to the exhaust. For this to work correctly, the entire system must remain stock, meaning no intake or exhaust modifications or aftermarket parts. Once changes have been made, the system is no longer in an equilibrium, so it often leads to "backfiring". Possible backfire could damage the exhaust system of the bike. By removing the entire system, and replacing with plates, one can nearly eliminate all backfiring, even if no modifications have been made. Also, since the clear air injection is adding extra air from the air box you can gain some increase in air box pressure when at speed. With the clean air system in place, any air/fuel sensors on the bike will show a leaner running engine causing your bike to adjust the fuel system too rich. This can only be prevented by eliminating the clean air system (AIS) and all associated hoses. This also cleans up the look of the bike and removes a significant amount of weight. Installation The kit comes with complete instructions for installation. It is easy, just take it slow and pay attention. It is a straight forward process, and we offer full support, instructions. Only basic hand tools are required. Fair and Honest Guarantee Our goal is to provide a quality upgrade for your bike at a reasonable cost. If you receive your kit and have questions please contact us and we will do what it takes to ensure your satisfaction. We have worked to keep our overhead low and are able to pass along those savings to our customers, hence the price differences. FAQ'S Q: Is this kit for all (1,2,3,4,6) valves on my bike? A: Yes, 1 Kit is for all the valves on the bike. You only need to order 1 Kit for your bike. Q: Do you ship international, and how much? A: Yes, we ship worldwide, for $18.42. Q: What size plates come in this kit? A: Each kit is different, based on the bike, modifications, and operating altitude, so jet sizes vary. Q: Do I need an AIS Block Off Kit? A: If you have made any modifications, or want reduce backfiring, remove weight, Clean up the engine clutter, then yes you do need a kit. Q: Can I install this kit? A: Yes, you can install it, don't be intimidated if you've never done this before, only very basic skills are needed, and it has instructions with full support. Q: How long does it take to install? A: Time varies, but it is directly related to the # of valves on your bike. Allow at least 1/2 hour per valve.