General Engine Powered Products
Hummer H1

Powerful enough for racing
Tough enough for the miltary

Your mission is to win. In order to win you need the best equipment. When you require the best engine for your H1 Hummer® then look no further than General Engine Powered Products. Our 30 years of expertise in high-performance engine design has culminated in offering the customized GEPP 6.5L diesel Optimizer engine.

GEPP takes the power, performance, and reliability of the fine General Engine Products Optimizer 6500 engine and adds performance enhancements to create the finest engine available for both military and racing applications.

GEPP's engines have been used by virtually every H1 off-road race team and by many military groups worldwide. This level of performance is now available to meet your needs. Choose GEPP engines. to win.

Hummer H1

GEPP Power Units - Industrial strength power

You can use the toughness and reliability of the famous GEPP diesel engines for industrial applications as well. GEPP industrial power units are custom crafted to your specifications and are built for exceptional duty in demanding environments.

GEPP power units are available as either open or enclosed units and are specifically designed to meet your requirements. All units use customized current-production engines with EPA certification and are available in many configurations (click here for more information).

GEPP power units have already been trusted in many critical industrial applications. Rely on them to get the job done for you!

Hummer H1

Your source for 6.5L engine parts

Do you know where your replacement parts came from? GEPP is your best source for genuine American-made parts for the 6.5L diesel engine!

Don't be fooled by aftermarket part made overseas. These can be hit or miss. The parts we sell are new, standard production American-made parts. We sell no oversize or rebuilt parts.

GEPP also provides you with tools to easily find the part you need. Follow the Find Parts link on any page to search by part number, description keywords, or (coming soon) by using our exclusive exploded-view parts index.

Our parts search engine will automatically cross-reference any parts that are offered under a different number or as part of an assembly. Still not found? Let us do the leg-work for you! With one click you can initiate a parts inquiry and a GEPP representative will get back to you promptly with information on the part you're looking for.

Need accessories for your off-road rig? In partnership with Ultimate Off Road Vehicle Accessories ( GEPP also offers performance accessories for your Hummer H1.

Be sure to shop GEPP first to find the finest parts and accessories for your high-performance diesel engine and off-road vehicle!