3% increase in Horsepower and Torque. The key to making power with any engine is abundant air and fuel flow into the combustion chamber. Swapping your stock air filter for this Stage1 High Performance Air Cleaner is a great way to create more power and improve acceleration. Not only does the Stage 1 Performance air cleaner non-woven media improve power through better flow, it also provides high efficiency cleaning to protect your engine from damaging dirt and debris. The muscle car-inspired design increases the volumetric efficiency and creates a ram air effect, which increases engine power as you increase the speed of the motorcycle. Variable length fins inside the intake tract are tuned to optimize and smooth the airflow inside the housing. The steel cover provides the same legroom as stock. Adding the final bit of style is the iconic Indian script logo embossed across the face of the housing cover. What's Included Air cleaner cover and base, installation hardware, brackets and filter media. Also includes Stage 1 VCM Calibration. FITMENT : 2021 Vintage Dark Horse 2021 Roadmaster Limited 2020-2021, 2017-2018 Chieftain Elite 2020-2021 Roadmaster Dark Horse 2020-2021 Indian Vintage 2020, 2018 Roadmaster Elite 2020 Indian Chief Dark Horse 2018-2021 Springfield Dark Horse 2018-2020 Chieftain Classic 2018, 2016 Chief 2017-2021 Chieftain Limited 2017-2019 Chief Dark Horse 2017-2018 Roadmaster Classic 2016-2021 Springfield 2016-2021 Chieftain Dark Horse 2015-2021 Roadmaster 2014-2021 Chieftain 2014-2019 Chief Vintage 2014-2018 Chief Classic
One Thunderstroke® Stage One Performance Air Intake. 3% increase in horsepower over stock. Ram air intake with internal channels for a smoother delivery. Non-woven, synthetic filtration media for high-filtration efficiency without re-washing
IND 2022-2023 Chieftain Dark Horse Icon 2021-2023 Roadmaster Limited 2021-2023 Indian Springfield Dark Horse 2021-2023 Indian Springfield 2021 Vintage Dark Horse 2020-2023 Roadmaster Dark Horse 2020-2022, 2017-2018 Chieftain Elite 2020-2021 Indian Vintage 2020, 2018 Roadmaster Elite 2020 Indian Chief Dark Horse 2018-2020 Springfield Dark Horse 2018-2020 Chieftain Classic 2018, 2016 Chief 2017-2023 Chieftain Limited 2017-2019 Chief Dark Horse 2017-2018 Roadmaster Classic 2016-2023 Chieftain Dark Horse 2016-2020 Springfield 2015-2023 Roadmaster 2014-2023 Chieftain 2014-2019 Chief Vintage 2014-2018 Chief Classic