Overview
LSA LS9 Boost Control System – SmoothBoost Active Bypass Valve
Upgrade your supercharged GM engine with the SmoothBoost Boost Control System, crafted specifically for the factory LSA and LS9 platforms. Replace the stock vacuum bypass with a precision electronic valve for smoother boost control, tighter throttle response, and improved drivability—ideal for aggressive street driving or track use.
This boost control system uses a 0–5 V electronic actuator, eliminating typical boost spikes, lag, and idle fluctuations seen with vacuum setups. Key benefits include:
- More linear boost delivery and throttle feel
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Boost curve adjustments without pulley swaps
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Support for boost scramble and boost kill features
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Clean harness and full install hardware included
SmoothBoost’s controller is engineered for seamless integration with factory or upgraded superchargers. Enjoy bolt-on installation, OEM-level fit, and USA-based technical support—this solution is the smart upgrade for LS9 or LSA supercharged enthusiasts.
Fits factory and aftermarket LSA and LS9 based superchargers