ThunderMax Fuel Tuner for 2012-2020 Harley-Davidson Sportster, Softail, and Dyna Heavy Listings Machined openings around the rim

Machined openings around the rim add style and provide additional air flow

2-into-1 equal-length headers

no matter what obstacles come your way

That placement was such a good idea that the MoCo is still putting filters there decades later

and the Harley-Davidson port design left a lot to be desired

ThunderMax Fuel Tuner for 2012-2020 Harley-Davidson Sportster, Softail, and Dyna Heavy Listings Machined openings around the rimThunderMax Fuel Tuner for 2012 2020 Harley Davidson Sportster, Softail, and Dyna Looking for a do it all tuner? The ThunderMax is innovative because it's not a traditional tunerit's a complete ECM! Kit includes ThunderMax ECM with Auto Tune Module Plug and play harnesses Two wideband oxygen sensors ThunderMax software and communication USB cable Instructions Can benefit from dyno tuning, but it's not required if you choose to allow your ThunderMax to