RennTech Tuning Box Kits

Tuning Box Kits are similar to a piggyback ECU that taps into against sensors such as boost and manifold pressure to increase your vehicles horsepower and torque. The Tuning Box kits are plug and play so they can easily be reversed for warranty, competition use, or any other need you may have. Tuning Box kits do not relate to the ECU but change the signal that the ECU is sending to the sensor. With this, most tuning box products cannot control or modify sensors or codes. We carry Tuning Box products from Armytrix, aFe, VR Tuned, and more.

RENNTECHs philosophy has always been to produce products without compromise, and that dedication continues to this day. True to Mercedes-Benz quality, RENNTECH cars are designed to be fast yet refined. Regardless of specification, they run faultlessly, idle smoothly, and have reliability and ease of maintenance comparable to the stock Mercedes-Benz. This attention to detail has made RENNTECH the choice of some of the most discriminating enthusiasts in the world.

View all RennTech Tuning Box Kits products

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	RENNtech ECU Upgrade Mercedes-Benz CLA 45 AMG 14-15+ Model Number: ECU:54.117.CLA45 View Price RENNtech's proprietary ECU upgrade for the Mercedes M133 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability. The RENNtech tuning module allows the user to change the performance level and gives the ability to set different performance levels running both higher or lower boost compared to delivered settings. This gives you power on demand or economy when you want with smooth torque delivery and performance thr...