3 Minutes
Signature Autosport Turns a Wrangler into a 707‑HP Off‑Road Monster
What started as an enthusiast daydream — a Jeep Wrangler with a Hellcat heart — has been realized by North Carolina tuner Signature Autosport. The company swapped the stock powerplant of a 2018 Wrangler Unlimited Rubicon for a supercharged 6.2‑liter HEMI Hellcat V8, producing a staggering 707 horsepower and 880 Nm of torque. Offered at about $99,950, this build blends legendary off‑road capability with muscle‑car thrust.
Powertrain and mechanical upgrades
This conversion is far more than an engine transplant. The stock 3.6‑liter V6 (rated around 285 hp) was replaced with the Hellcat unit, and engineers recalibrated the automatic transmission to manage the huge increase in torque. To protect the drivetrain and maintain reliability off‑road, the build includes:
- Upgraded cooling: larger radiators, dual electric fans, and a new engine oil cooler
- Heavier-duty driveshafts and reinforced components to handle the torque
- Stainless steel dual‑exit exhaust for better flow and a bold sound
These changes are critical: without strengthened driveline parts and improved cooling, a high‑output V8 can overwhelm factory transmissions and axles, especially under low‑speed, high‑load off‑road conditions.
Suspension, wheels and exterior
Signature Autosport fitted 20‑inch FUEL wheels wrapped in off‑road tires and installed Falcon shocks up front to enhance ride quality and control. Electrically folding side steps make entry easier given the taller stance and beefy tires. Visually the Wrangler keeps its rugged silhouette but gains a more aggressive presence thanks to the exhaust and wheel package.
Interior and comfort
Inside, the conversion balances performance with daily comfort. The cabin receives heated front seats, an Alpine sound system with nine speakers tied to a 6.5‑inch display, and a leather‑trimmed steering wheel. It’s a reminder that extreme builds can still be practical for weekend adventures or long highway runs.
"It's ridiculous — and wonderful," is a fair summary: you probably won’t need 707 hp while crawling rocky trails, but the combination of a Hellcat V8 and Wrangler capability creates a unique, adrenaline‑charged package.
Market perspective and who should consider it
This Wrangler Hellcat conversion appeals to a niche of buyers who want the iconic Jeep off‑road platform combined with unapologetic American muscle. It competes more with aftermarket builds and custom coachwork than factory SUVs. Potential buyers should expect higher running costs and the need for careful maintenance, but they'll also own one of the most dramatic Wrangler builds on the market.
Highlights:
- Base: 2018 Jeep Wrangler Unlimited Rubicon
- Engine: 6.2L supercharged HEMI Hellcat V8
- Power: 707 hp, 880 Nm torque
- Price: approx. $99,950
This is a headline‑grabbing build that showcases what modern tuning can do: fuse brute horsepower with traditional off‑road DNA to deliver something rare, loud, and undeniably fun.
Leave a Comment