Hey Guys,
Here is a super clean system I am working on. It fits cleanly under your seat and between the side panels. Looks OEM. Some important factors to consider are the diameter and length. The stock air box has a built in velocity stack as the intake boot. This venturi design is very important to maintain or duplicate as closely as possible or your bike will not run properly. The system I have designed closely replicates this. If you have a long 2" intake tube to your pre-filte, you will suffer performance greatly. The 2" end connecting to the throttle body should be no longer than 3" to 3 3/4", then as enlarge as you have room for, as quickly as possible, will replicate the volume and velocity required. This system is 2" for 3" in length, then expands to 3" in the shape of a venturi. The 3" pre-filter is attached via a stainless steel silicone joiner. Do "not" run a foam filter under the pre-filter. The pre-filter sucks against the foam and will glaze over reducing air flow. Run the pre-filter only, as you would on a sled.