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E90 ECM Upgrade
The K&N Air Oil Separator is quick and easy to install in about 30 minutes with basic tools and uses factory-style hose connections to quickly snap on and off
Achieve that polished OEM factory look while ensuring a secure and robust intercooling system with improved water flow and fewer components
Surface area is greatly increased and designed to provide more filtration than any other comparably sized product
Through careful CAD and FEA design efforts
99-2020 K&N Octane Booster, 16oz ST E90 ECM UpgradeK&N Performance+ Octane Booster boosts power and helps increase performance by reducing detonation, resulting in less knocks, pings and hesitation. This product helps clean internal fuel system parts, while safe on catalytic converters and oxygen sensors.
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