RENNtech Hand Held Tuner Model:C450 You must fill out and

You must fill out and include a copy of the ECU Information form along with your ECU upon sending it in

Perfect fitment

and map guide be sure to visit N54tech

BMW 3 Series

Remember the JB4 does not require any additional modifications or previous stages

RENNtech Hand Held Tuner Model:C450 You must fill out andTHE HAND HELD TUNING MODULE TUNE OR STOCK ON THE GO The RENNtech Hand Held Tuning Module creates significant gains in horsepower and torque across the vehicles entire power band. By modifying ignition timing and throttle mapping, optimizing air to fuel ratios, increasing the engines rev limiter and modifying boost mapping for turbo charged vehicles, RENNtech performance software unleashes the true potential of your Mercedes. RENNtech HHT (Hand Held