AEROFLOW PERFORMANCE CYLINDER HEAD BOLT KIT [HOLDEN V8 GEN III LS1 5.7L, GEN IV LS2 6.0L & LS3 6.2L MOTOR]

AEROFLOW PERFORMANCE 8740 GRADE CYLINDER HEAD BOLT KIT
12 POINT HEADS
HOLDEN V8 GEN III LS1 5.7L MOTOR
SECOND DESIGN CYLINDER HEAD
HOLDEN V8 GEN IV LS2 6.0L & LS3 6.2L MOTOR

2004-2017 HOLDEN [VY-VZ-VE-VF COMMODORE]
2004-2017 HOLDEN [WK-WL-WM-WN STATESMAN/CAPRICE]
2004-2017 HOLDEN [VY-VZ-VE-VF UTE]
2004-2005 HOLDEN [VZ MONARO CV8]

Aeroflow Performance head bolts greatly improve your cylinder head-to-block sealing compatibilities. This is important in engines with high power adders such as turbochargers, superchargers or nitrous. They can even be agreat addition to a mildly modified build as insurance against failure.

These head bolts are manufactured from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity within the bolt. Meaning these bolts are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. Allkits come complete with hardened parallel washers for an even load distribution and accurate torque readings.

SPECIFICATIONS:
20 X LONG BOLTS
103.2MM UNDER HEAD LENGTH
10.9MM SHANK LENGTH
M11 X 2.00MM THREAD INTO ENGINE
18.7MM BOLT HEAD DIAMETER

10 X SHORT BOLTS
48.4MM UNDERHEAD LENGTH
7.7MM SHANK LENGTH
M8 X 1.25MM THREAD INTO ENGINE
14.6MM BOLT HEAD DIAMETER

20 X LARGE FLAT WASHERS
21.8MM OUTSIDE DIAMETER
11MM INSIDE DIAMETER
3MM THICKNESS

20 X SMALL FLAT WASHERS
15.8MM OUTSIDE DIAMETER
8.25MM INSIDE DIAMETER
3MM THICKNESS

REPLACES GENERAL MOTORS (GM) PART# 12558840 & 19258707

SPECIAL NOTE:
MUST HAVE 2MA ON REAR OF CYLINDER HEAD(S)

IMPORTANT NOTE:
FOLLOW HOLDEN'S RECOMMENDED TORQUE SEQUENCE AND TIGHTEN BOLTS TO SPECIFICATIONS