AEROFLOW PERFORMANCE 8740 GRADE
CYLINDER HEAD STUD KIT
12 POINT NUTS
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 studs 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. All head studs provide a more accurate and consistent torque loading over traditional head bolts.

These head studs are manufactured from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity within the stud. Meaning these studs are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. All kits come complete with 12-point nuts and hardened washers for an even load distribution and accurate torque readings.

SPECIFICATIONS:
20 X EVEN LENGTH STUDS
133MM OVERALL LENGTH
50MM SHANK LENGTH
M11 X 2.00MM THREAD INTO ENGINE BLOCK
M11 X 1.25MM NUT END

20 X 12 POINT NUTS
M11 X 1.25MM THREAD
18MM OUTSIDE DIAMETER
11.60MM HEIGHT

20 X FLAT WASHERS
20MM OUTSIDE DIAMETER
11.10MM INSIDE DIAMETER
3MM THICKNESS

10 X SUPPORT STUDS
63.75MM OVERALL LENGTH
9MM SHANK LENGTH
M8 X 1.25MM THREAD INTO ENGINE BLOCK
7/16"-20 NUT END

10 X 12 POINT NUTS
7/16"-20 THREAD
15.70MM OUTSIDE DIAMETER
10MM HEIGHT

10 X FLAT WASHERS
15.75MM OUTSIDE DIAMETER
8.50MM INSIDE DIAMETER
2MM 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 TO SPECIFICATIONS