RENNtech SEC V12 WIDEBODY M120
A continuation of the legend—reimagined in twelve-cylinder form
Raw power meets timeless design in the RENNtech 560 SEC V12 Widebody, a resurrection of Mercedes-Benz’s most iconic coupe—now infused with the relentless force of a RENNtech-built 7.4L M120 V12. Available in two performance configurations, this engine delivers between 525 and 600 horsepower, surging with effortless power and unmistakable intent
Equal-length headers unleash a high-revving exhaust note that echoes the symphony of V12-era Formula 1—an intoxicating sound that resonates with motorsport legacy and engineering excellence
Transmission options include a refined 5-speed automatic or an optional 6-speed manual, offering a visceral connection between driver and machine. The widebody silhouette, inspired by the bold presence of pre-merger AMG icons, has been reengineered for improved aerodynamics, cooling, and road presence—anchored by RENNtech-forged wheels and signature design details.
Handcrafted at RENNtech’s headquarters in Stuart, Florida, each build begins with the owner’s original 560 SEC and is transformed into something far greater—a one-of-one machine born from heritage, driven by innovation, and destined to disrupt everything that came before it.
POWER AND PERFOMANCE SPECIFICATION
BASE VEHICLE:
Mercedes-Benz SEC 380 / 420 / 500 / 560 (C126)
MY 1981 – 1991
Base Engine: M116 / M117
Stock Power: 204 – 295 HP 225 – 336 LB-FT TQ
ENGINE
Power Options
A) 7.4 M120 V12 | 525 HP & 550 LB-FT TQ
– M120 V12 Donor Engine
– 7.4 -liter Displacement
– Forged Crankshaft
– Titanium Connecting Rods
– Light Weight Pistons
B) 7.4 R M120 V12 | 600 HP & 620 LB-FT TQ
– M120 V12 Donor Engine
– 7.4 -liter Displacement
– Forged Crankshaft
– Titanium Connecting Rods
– Light Weight Pistons
– Stage 1 Intake and Exhaust Camshafts
– CNC Ported Heads
– CNC Ported Intake Manifold
Add $24,000
POWERTRAIN
POWERTRAIN
A) STANDARD | 5-Speed Automatic
– 5 -speed Automatic Transmission (722.6) Donor
– Rebuilt and Reinforced
– Lockup Torque Converter
B) Transmission Swap | 6-Speed Manual
– Manual Transmission Swap
– Getrag 6-Speed Tansmission
– Performance Clutch
– Shifter and Pedal Assembly
Add $50,000
DIFFERENTIAL
– Limited Slip
– Upgraded Axle Shafts
EXHAUST
– Stainless Steel Equal Length Headers
– Downpipes with Performance Cats
– Cat-back Exhaust with Performance Mufflers
– Dual Stainless Steel Exhaust Tips
CHASSIS
SUSPENSION
– RENNtech Adjustable Coilovers
– RENNtech Swaybar
– High Performance Control Arms
BRAKES
A) Steel Brakes
– Steel Brake Discs
– 372 mm (F) 325 mm (R) Rotors
– 6 Piston Calipers (F) 4 Piston Calipers (R)
B) Carbon Ceramic Brakes
Add $21,000
– Carbon Ceramic Discs
– 402 mm (F) 360 mm (R)
– Calipers 6-piston (F) 4-piston (R)
– NOTE: Carbon Ceramic Brakes Require 19″ Wheel Size
WHEELS:
A) RENNtech Classic SEC -design
– Forged Aluminum 2-piece
– 18 x 10″ (F) | 18 x 12″ (R)
– 275/40/18 | 335/35/18
B) Custom Design Wheels 19″
Add $20,000
– RENNtech Studio Design
– Forged Aluminum 2-piece
– 19 x 10″ (F) | 19 x 12″ (R)
– 275/40/19 | 335/35/19
EXTERIOR
BODY & PAINT
– RENNtech Widebody Conversion
– RENNtech Aero Upgrades
– Exterior Paint to Match Original M.B.
– RENNtech V12 Logos
OPTIONAL
– Exterior Color Change (Price by Request
INTERIOR
– Re-upholstered Front and Rear Leather Seats
– Re-upholstered armrest
– New Headliner
– A and B Pillars in Alcantara
– Continental Head Unit with Bluetooth Connectivity
Optional Custom Design Interior
Your dreams made into reality.
– RENNtech Studio Design
– Custom Trim
– Custom Upholstery
– Custom Seats
– Steering Wheel and Shifter
– Gauges and Interior Lighting
– Custom Sound System (McIntosh / Nakamichi)
SEC 560 V12 WIDEBODY STARTING AT $690,000
Note: Price does not include donor vehicle or State Sales Tax.
Customer responsible for transport to and from RENNtech, Inc.
All additional repair and restoration work billed at $255 / H plus parts.
Additional Optioins Per Customer Request