2 minute read

If the words “660-horsepower naturally aspirated V12” don’t make you stop scrolling, I don’t know what will.

Florida-based tuner RENNtech has just unveiled the Sledgehammer — a jaw-dropping restomod built on the bones of the iconic Mercedes-Benz C126 SEC grand tourer from the 1980s. And yes, it’s every bit as wild as the name suggests.

The Heart of a Beast

At the core of this build is the legendary M120 V12 engine — the same powerplant that drove the Le Mans-winning CLK GTR and the Pagani Zonda. But RENNtech wasn’t content with stock specs. They’ve bored the engine out beyond even the ultra-rare 7.3-liter SL 73 AMG, fitting it with custom equal-length headers that deliver an intoxicating V12 roar.

Renntech Sledgehammer car engine

The result? A naturally aspirated 660 horsepower and 650 lb-ft of torque — all without a single turbocharger in sight. This is pure, analog driving at its finest.

A Frame-Up Restoration Done Right

RENNtech didn’t just drop a monster engine into an old shell. The Sledgehammer gets a complete frame-up restoration that modernizes every component while respecting the SEC’s timeless silhouette. A functional widebody kit with flared arches gives the car a menacing stance, while forged wheels improve both high-speed stability and cooling.

Each of the only 12 units being built will feature a fully bespoke interior, meaning no two Sledgehammers will be alike. First deliveries are expected in 2027.

Why This Matters

In an era dominated by electric powertrains and hybrid tech, the Sledgehammer is a defiant celebration of mechanical purity — of what happens when passionate engineers pour their souls into keeping the analog dream alive.

Named after AMG’s mythical Hammer from the same era, this is more than a car. It’s a rolling piece of automotive art.

LEARN MORE AT RENNTECH