Enginetech HB171 Cylinder Head Bolts Set (both heads) for 1997-2004 Chevrolet GM Gen III LS 4.8L 5.3L 5.7L 6.0L EnginesPN: HB171 3 different length bolts (early style) Enginetech HB171 Cylinder Head Bolts Set includes both heads for 1997 2004 Chevrolet GM Gen III LS 4. 8L 5. 3L 5. 7L 6. 0L Engines. Engineered for increased tensile strength to ensure a secure installation, these high quality bolts provide a tight, leak free seal.

Notes GM CAR 350/5

55 Lobe Lift Intake 0

and a siphon

Exhaust Duration at 050 inch Lift: 211

Use R40058 or M40058 rings

Undercut Stud: No

High Performance Series

King XP / Clevite H Race Bearings

King XP / Clevite H race bearings

enough to do 16 valves

'04 Pontiac GTO (LS1) / Drive-by-cable

Cap Retention Style:Through-bolt