there are legit ones with proper turbines.. however they are a massive drain on battery juice... required like 6 additional batteries in the boot to maintain 1min worth of 8psi boost... again the additional weight disadvantage outweighs any gain.... maybe a good alternative to nos though as it is rechargeable. but then ask anyone with hydraulics how long it takes them to fully charge the 1 spare battery they have in the boot let alone 6.




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