RENNtech's 3rd Generation Diverter Valve for the M157 5.5L V8 BiTurbo features an all-new Blow-Off Valve implemented into the re-designed OEM turbo tubes.

The Diverter Valve releases the boost in high-boost situation and/or boost spikes. This especially helps during the shifting process, for faster shifting and a quicker boost response for the next gear. It helps to eliminated the so called 'Boost Lag'.

With the installation of the RENNtech Diverter Valve, we are able to supply the engine with more boost pressure in order to gain higher HP numbers. 

Please see the RENNtech R1 Package for the M157 engine for the perfect combination of the RENNtech ECU Upgrade and Diverter Valve.

The turbo tubes are ceramic coated in titanium to sustain high temperature and provide a more aesthetic look in the engine bay.

Notes:

• This Diverter Valve Upgrade requires an additional core charge, which will be credited upon return of OEM pipes to RENNtech

Fitment:

• W/S 212 - E 63 AMG Wagon and Sedan | 4MATIC
• C 218 - CLS 63 AMG Coupe and Shooting Brake | 4MATIC

**VIN NOTE** RENNtech often requires your vehicle's VIN number to process orders. Please leave this information in a note during checkout or email us with your order number after order is placed*

RENNtech has become the premier Mercedes-Benz specialist and Hartmut Feyhl himself is regarded by many as USA’s foremost authority in Mercedes tuning. His vast experience comes from 12 years spent at AMG Germany before serving as the North American division’s Technical Director. Prior to the tuning company’s merger with Mercedes-Benz in 1999, by the request of AMG Germany, Feyhl branched out on his own to start RENNtech and service the existing AMG North America customers.

Performance without compromise. This is the foundation upon which we have built our reputation. Established in 1989 by Hartmut Feyhl, RENNtech has evolved and grown from servicing AMG’s customers into the foremost authority on tuning and customizing AMGs and Mercedes-Benz. RENNtech also offers tuning solutions for Porsche, Audi and Bentley vehicles, along with other European luxury cars.

Over the years, we have developed high-performance products for virtually all Mercedes-Benz AMG vehicles. Some of the most notable among these are the 200 mph RENNtech E7.4RS (which claimed ‘Fastest Sedan in the World’ honors by Car and Driver Magazine in 1996) and the more recent 945 LB-FT 5.5L V8 Biturbo RENNtech R3+ Monster. Each of these vehicles are just a sampling of what RENNtech has achieved, featuring extreme performance, upgraded aesthetics and a fit and finish that rivals factory vehicles.

We design, engineer and manufacture our proprietary line of tuning products in-house at our facility which features a full fabrication and machine shop with CNC and rapid prototyping capabilities; in-house performance dynos, complete engine management and software tuning capabilities along with a complete service/repair/installation facility and a full-time design, engineering and sales staff.

Our headquarter facility is located just north of the Palm Beaches in Stuart, Florida