RENNtech Stainless Steel Long Tube Headers for W463 - G55/500 hsm we recommend remapping the ECU

we recommend remapping the ECU in order to prevent potential »check engine light« warning signals

The power and torque gains of the BMW M3 with the Evolution system are just amazing

Note: Mercedes M157 engine performance when measured

E400 (MY2018+ | C238 | M276 | 3

RENNtech Stainless Steel Long Tube Headers for W463 - G55/500 hsm we recommend remapping the ECURENNtech Stainless Steeel Long Tube Exhaust Headers for W463 G 55 500. Gaines: G55: +35HP & 35TQ G500: +25HP & +25TQ Designed, engineered and manufactured in house specifically for your Mercedes Benz. Our purge welded, ceramic coated long tube headers feature top of the line big tube T 304 stainless steel tubing and are manufactured from the same high quality materials used on all RENNtech headers. We ceramic coat our headers to retain heat within