The HUMMER H3R concept is powered by a LS7 7.0 liter V8 engine the develops 505 hp and a Hydra-Matic 4L60 electronically controlled four-speed transmission. You can see the HUMMER H3R at SEMA, but unfortunately GM says that a production version of the The HUMMER H3R "isn’t in the cards".
Hummer Press Release:
HUMMER H3R OFF-ROAD CONCEPT
Thanks primarily to the efforts of the Team HUMMER racing team, led by Rod Hall, the HUMMER H3 has quickly proved to be a formidable off-road competitor. It runs – and wins – in stock-class off-road races, where racers must rely on production chassis and powertrains.
The H3R pays homage to the racing SUV while pushing the envelope on what could be considered “stock” – supposing the factory decided to drop in the 505-horsepower, 7.0L V-8 from the Corvette Z06. In addition to the high-powered engine, the H3R also sports a number of racing-inspired exterior modifications and an interior that blends racing functionality with boulevard comfort and convenience. No, a production H3 equipped with an LS7 engine isn’t in the cards, but for 2008, HUMMER offers the H3 Alpha, which is powered by a new, 300-hp 5.3L all-aluminum V-8.
Vehicle highlights:
H3R concept
LS7 7.0L V-8 with 505 horsepower and Hydra-Matic 4L60 electronically controlled four-speed transmission
Custom valve covers and ignition coil covers
New, forward-tilting hood with Lexan see-through insert
Power-operated hood hinges
Custom air induction system with dual air boxes
Racing-inspired paint scheme with custom badging
Off-road lighting package with unique light bar
Custom rear dual exhaust system with four outlets
Wheel flares with quick-remove fasteners
HID headlamps from Starr Lighting
Clear front corner lamp lenses
Front bull bar
Body-color “Jerry” can mounted on the spare tire carrier
Twenty-inch wheels
Mickey Thompson Bear Claw 35-inch off-road tires
Rotora high-performance brake package
Fixed quarter window inserts
Eaton front locking differential
Enhanced cooling system with larger radiator
Modified suspension with Tenneco/Rancho four-inch lift package and Rancho reservoir shocks
Re-trimmed interior with brushed metal accents and trim
Front racing seats with five-point safety harnesses and weather-resistant seat material
Simpson window safety net
Washable rubber floor covering replaces carpeting
Navigation radio system
Off-road integrated display gauge package with compass, inclinometer, altimeter and timer
Auxiliary performance gauges
Auxiliary 20-gallon fuel tank
Second-row seats deleted
Cargo-area spare tire mount
GM Accessories (production and concept)
Rocker protectors
Underbody shield
Side-window weather deflector
Roadside assistance package
First-aid kit
Hitch receiver cover
Body-color grille
