Performance Upgrades

"RELIABILITY" Upgrade Kit 2-WD trucks and Sub - BEST 1st thing to do for your 6.5
Our Low Price: Only $875.00

Brand: HDP Performance
Product No: #HDP1676

Correct all the most common issues! Two wheel drive models. SPL Package Pricing saves $50!

CYLINDER HEAD STUD kit all 6.2 & 6.5 - Premium Cylinder Head fastening kit
Our Low Price: Only $269.00

Brand: HDP Performance
Product No: #HDP1668

Premium cylinder head stud kit for 1992-2004 6.5 trucks, Subs and Hummer H-1.

Fluidampr Harmonic Dampener
Our Low Price: Only $414.95

Brand: HDP Performance
Product No: #HDP1655

Fluidampr performance diesel dampers offer the bestt protection against torsional vibrations. Performance tuned or stock, your diesel engine will run more efficiently with a viscous Fluidampr installed.

GLE Towing computer-prom 1994-1995 C-K models - Towing program
Exchange: $349.00 - Core Charge: $150.00

Brand: HDP Performance
Product No: #HDP1636

ORDER ONLY BY PHONE: GLE is engineered to enhance towing performance and improve towing fuel economy.

GLE Towing progam computer upgrade 1996-2000 C-K models - Towing
Exchange: $495.00 - Core Charge: $300.00

Brand: HDP Performance
Product No: #HDP1637

ORDER ONLY BY PHONE: GLE is engineered to enhance towing performance and improve towing fuel economy.

MAIN BEARING CAP STUD kit 1992-1996 6.5 - engines without oil cooled pistons
Our Low Price: Only $329.00

Brand: HDP Performance
Product No: #HDP1666

Heath Diesel Heavy-Duty main cap stud kit for 1992-1996 6.5 engines without oil-cooled pistons.

MAIN BEARING CAP STUD kit 1982-1993 6.2
Our Low Price: Only $329.00

Brand: HDP Performance
Product No: #HDP1667

Heath Diesel Heavy-Duty main cap stud kit for 1982-1993 6.2 engines.

PERFORMANCE GL4 upgrade computer 1996-2000 C-K models - High Performance
Our Low Price: Only $495.00

Brand: HDP Performance
Product No: #HDP1638

ORDER ONLY BY PHONE: Max E Tork GL4 computer upgrade delivers maximum power with excellent fuel economy! Adds 75-80 hp at engine (60-65 hp at rear wheels)

PERFORMANCE GL4 upgrade prom 1994-1995 C-K models - Maximum power and torque!
Exchange: $349.00 - Core Charge: $150.00

Brand: HDP Performance
Product No: #HDP1635

ORDER ONLY BY PHONE: GL4 is the ultimate performance program for your '94-'95 6.5. Adds 75-80 hp at engine (60-65 hp at rear wheels)

PERFORMANCE GL4-H computer upgrade 1996-2003 Hummer H-1 - Performance with economy
Our Low Price: Only $495.00

Brand: HDP Performance
Product No: #HDP1545

ORDER ONLY BY PHONE: GL4-H upgrade substantially improves power and economy

SCAT heavy-duty high performance CRANKSHAFT 6.5
Our Low Price: Only $459.00

Brand: HDP Performance
Product No: #HDP1669

Premium quality SCAT brand replacement crankshaft for 1992-2004 6.5