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ARP 135-7121 Engine Rocker Arm Stud

Manufacturer

ARP

<p>Today, ARP&rsquo;s product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline and throughout the suspension and frame. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, NASCAR and NHRA drag racing and marine applications.</p>

Picture for manufacturer ARP 155-6002 Automotive Racing Products Ford Fe Rod Bolt Kit

Part Number

135-7121
11 reviews
04/19/2034 2:37 PM
Sale Price

$9.20

In Stock (10+)

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Usually delivered within 2 days

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Product Details

ARP 135-7121 Engine Rocker Arm Stud

Rocker Arm Studs
High Performance Series
Shank Under Hex to Locate Guide Plate
2Pieces

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

HIGH PERFORMANCE SERIES
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.

PRO SERIES
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.

IMPORTANT TECH NOTE
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.

Products specifications

Adjuster Thread Depth

0.85

Base Dia/Thread

7/16-14

Base Thread Length (in)

0.800 in.

Base Thread Size

7/16-14 in.

Effective Stud Length (in)

1.750 in.

Guideplate Locator Shank

No

Quantity

Sold as a pair.

Rocker Arm Nut Thread Length (in)

0.850 in.

Rocker Arm Nut Thread Size

7/16-20 in.

Screw-In Thread Depth

0.8

Shank Dia/Thread

7/16-20

Stud Height

1.75

Great cheepest price for what I needed

Ordering was easy

No

Excellent. Exactly as shown, just what I needed. Quick delivery. Great price.

Great besides 1 wheel was missing the center cap

excellent service, i had to wait a few days for the order to be processesed, but only because i ordered on Friday afternoon, but love the site!

Really good prices and fast delivery.

This was my first time using autoplicity and I was very happy with their service. Great prices and fast shipping.

Very easy webpage to use and search for items by selected vehicle. Shipping was fast and good notification system when order has shipped. Great prices, Would use autoplicity again and would reccomend to everyone.

great price

Shipped and received in quick fashion. Item arrived as expected. Would definitely buy from again!

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