SEC V12 Widebody SLEDGEHAMMER
One of Twelve—Limited Production I Arriving in 2027
RENNtech is proud to announce the ultimate evolution of the C126 560SEC platform - the RENNtech SEC Sledgehammer.
The Reimagined SEC Widebody merges the bespoke customization process with cutting edge design, precision engineering, and more than 35 years of Performance Without Compromise.
Powered by V12 based on the legendary M120 and Limited to just 12 Commissions Worldwide, the SEC Sledgehammer is tailored to each individual owners discerning taste.
M120 V12
The First 7.5 liter SEC in the World
660 HP 7.5 liter V12
M120 V12 is one of the most legendary engines in Mercedes-Benz history—an all-aluminum, naturally aspirated masterpiece that powered icons from the Le Mans-winning CLK GTR to the Pagani Zonda. Originally developed for endurance and motorsport durability, the M120 became synonymous with high-revving smoothness, bulletproof reliability, and unmistakable character. Its racing pedigree and exotic applications cemented its status as one of the great V12s of the modern era. In the SEC Widebody, RENNtech brings the M120 back to life—reengineered to 7.5 liters and 660 horsepower—preserving its soul while elevating its performance to a new peak.
Engine & Power
-M120 V12 | 650 HP and 650 LB-FT TQ
-M120 V12 Donor Engine
-Increased Displacement
-Forged Crankshaft
-Titanium Connecting Rods
-Light Wight Pistons
-Stage 2 Intake and Exhaust Camshafts
-Advanced CNC Ported Heads
-Advanced CNC Ported Intake Manifold
Exhaust
-Stainless Steel Equal Length Headers
-Downpipes with Performance Cats
-Cat-back Exhaust with Performance Mufflers
Transmission
-Manual Transaxle
-Optimized Weight Distribution
Suspension
-Carbon Ceramic Brakes
-Rotors: 402mm Front | 360mm Rear
-Calipers: 6-Piston Front | 4-Piston Rear
Brakes
-Carbon Ceramic Brakes
-Rotors: 402mm Front | 360mm Rear
-Calipers: 6-Piston Front | 4-Piston Rear
Wheels
-Custom 19-inch Wheels
-Four Wheel Design Options
-2-Piece Forged Aluminum
19 x 10.0 Front | 19 x 12.0 Rear
275/35/19 Front | 325/30/19 Rear