Overview
The Hennessey Mammoth 1000 Truck is a documented 1000-hp vehicle built by Hennessey Performance Engineering in Sealy, Texas.
10,000+ vehicles built — more documented performance builds than any other American boutique tuner.
2026 Trims & Pricing
Built to order by Hennessey Performance in Sealy, Texas.
Full Specs
| Spec | Mammoth 1000 Truck |
|---|---|
| Price | ~$150,000 |
| HP | 1000 hp |
| Base | Ram TRX |
| Built | Sealy, TX |
| Documented | Yes |
Hennessey Powertrain
The Mammoth 1000 upgrades the Ram TRX Hellcat V8 to 1,000 hp with Hennessey suspension lift and full documentation.
HPE has built 10,000+ documented performance vehicles with a track record of delivering on claimed numbers.
Performance Results
1,000 hp off-road truck — more power than the Ram TRX, Raptor R, and Shelby F-150 combined.
Every Hennessey vehicle is dyno-tested and documented before delivery.
Hennessey Heritage
Founded by John Hennessey in 1991 in Sealy, Texas. 10,000+ documented vehicles. Multiple world speed records.
Hennessey Performance has built 10,000+ documented vehicles since 1991 — more than any other American boutique tuner.
Reliability
Reliability data from Consumer Reports, J.D. Power, and NHTSA.
| Area | Rating | Status | Notes |
|---|---|---|---|
| Build Quality | ★★★★★ | Exceptional | Hand-built hypercar/performance |
| Ford Platform | ★★★★★ | Excellent | Proven base vehicle |
| Overall | ★★★★☆ | Excellent | Professional quality |
Check consumerreports.org and nhtsa.gov before purchasing.
Recalls
Verify at nhtsa.gov/recalls.
Verify at nhtsa.gov/recalls.
Updates
Pros & Cons
✓ Documented performance with warranty
✓ 1,000 hp Ram TRX — most powerful production truck
✓ Off-road and highway capable
✓ Full Hennessey documentation
✗ Premium over base vehicle
✗ ~$150K premium over base TRX
FAQ
- Hennessey Performance Engineering
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