Thunder Mfg adapter allows the use of any of several Thunder Mfg. airkits on your bike.
Thunder Mfg.'s adapters are designed for performance. We also strive to make our products easy to install and use. Note that when changing your airkit you must rejet your bike. If you have rejetted prior with a Dynojet jetkit you will not need to purchase a new jetkit, we will supply the main jets needed in your adapter.
If you have NOT already rejetted your bike with a stage 1 kit then you can purchase one here:
CLICK HERE TO CHOOSE A JET KIT