Without touching your engine, if you give it more airflow it will give you more power. As simple as this.
This Thunderbird Max-Flow Air Filter Kit is a cheap, easy to install and efficient way to give your motorcycle a nice power increase. It is s designed to replace the stock air cleaner assembly with a big breathing “Max Flow” element whose pleated material (2 3/4″ deep) is 100% washable, made of multiple layers of cotton gauze that traps the smallest dirt particles while providing a dramatic air flow increase.
The kit includes a one-piece cast backing plate with internal crankcase venting and mounting hardware. Fits fuel injected and carbureted Twin Cam® engines equipped with the factory TC88 “football” cover. 3 finishes available, cast, chrome & black. 5 1/2″ covers also available. Go to Thunderbird Max-Flow Air Filter Kits.