RENNtech ECU Upgrade for S 550 | W221 | 402 HP / 405 LB-FT | MY2007-2010 hsm Rear: Style: RTS Size: 20"

Rear: Style: RTS Size: 20" x 12"  Weight:   Construction: 1-piece Forged Tire Size: 335/30/20

The R3 upgrade features RENNtech’s Stage I turbochargers with lightweight forged billet turbo wheels with a larger impellers (inlet side) and an increase in the turbine trim (exhaust side)

391 LB-FT @ 3000 RPM

RPM for Audi 4

FL and manufactured in Germany

RENNtech ECU Upgrade for S 550 | W221 | 402 HP / 405 LB-FT | MY2007-2010 hsm Rear: Style: RTS Size: 20"RENNtech ECU Upgrade for 221 S 550. Up to 402HP and 405 LB FT. Gains: +20HP & 14 LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning software