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Part number: 100-7221
Product Details
ARP 100-7221 Rocker Arm Studs
Products specifications
Adjuster Thread Depth 0.58
Base Dia/Thread M10 x 1.50
Base Thread Length (in) 0.800 in.
Base Thread Size M10 x 1.50mm
Effective Stud Length (in) 2.386 in.
Guideplate Locator Shank No
Notes Fits Chevrolet 4.3L V6 Vortec cylinder heads.
Quantity Sold as a pair.
Rocker Arm Nut Thread Length (in) 0.580 in.
Rocker Arm Nut Thread Size 3/8-24 in.
Screw-In Thread Depth 0.8
Shank Dia/Thread 3/8-24
Stud Height 1.595
Rocker Arm Studs
High Performance Series

If you have ever installed a rocker stud into a cylinder head and watched it wobble as it screwed in you knew from the beginning that the rocker geometry was going to be inconsistent all over the place. ARP rocker studs are concentric within .005 T.I.R. thread pitch to thread pitch. They run-in straight and true. Lengths are exact designed to provide positive seating every time. An extra-large radius base offers greater resistance to flex. Available in both High Performance and Pro Series models.

NOTE: Not to be used with OEM-style, self-locking nuts. To be used with ARPs patented Perma-Loc adjusters

Made of 8740 chrome moly forgings and heat-treated to 180,000 psi. Excellent for E.T. Bracket Racing, limited rule oval track
competition and street use. Tip ground flush for optimum adjuster seating.

Designed for competition applications, ARPs Pro Series rocker arm studs are made of premium grade 8740 chrome moly steel and heat-treated to a tensile strength of 200,000 psi.

It is highly advisable to determine what the optimum rocker arm stud length is for your particular application. This is especially true when long pushrods and valves are employed you should raise the installed height of the rocker arm to compensate for the longer-than-stock components.

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