Performance Upgrades for Hummer H1

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.

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