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ARP 134-7121 High Performance Rocker Arm Studs 8740 Chrome Moly 2-Piece

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>

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Part Number

134-7121
17 reviews
03/12/2036 3:04 AM
Sale Price

$9.20

In Stock (10+)

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Usually delivered within 2 days

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Product Details

ARP High Performance Series rocker arm studs are precision-engineered to ensure consistent rocker geometry and reliable performance. Manufactured from 8740 chrome moly forgings and heat-treated to 180,000 psi tensile strength, these studs are designed for E.T. bracket racing, limited rule oval track competition, and high-performance street applications.

Key Features:

  • Concentric within .005" T.I.R. (Total Indicated Runout) from thread pitch to thread pitch for straight, true installation
  • Exact lengths designed to provide positive seating every time
  • Extra-large radius base offers greater resistance to flex under high loads
  • Tip ground flush for optimum adjuster seating
  • 8740 chrome moly construction heat-treated to 180,000 psi
  • Set includes 2 studs

Installation Notes:

  • Not compatible with OEM-style self-locking nuts—must be used with ARP's patented Perma-Loc adjusters
  • Verify optimum rocker arm stud length for your specific application, especially when using longer-than-stock pushrods and valves
  • May require raising the installed height of the rocker arm to compensate for extended length components

ARP rocker studs eliminate the wobble and inconsistency often experienced with standard studs, ensuring precise rocker geometry and dependable valve train operation across all cylinders.

Products specifications

Adjuster Thread Depth

0.8

Base Dia/Thread

7/16-14

Base Thread Length (in)

0.700 in.

Base Thread Size

7/16-14 in.

Effective Stud Length (in)

1.750 in.

Guideplate Locator Shank

Yes

Quantity

Sold as a pair.

Rocker Arm Nut Thread Length (in)

0.800 in.

Rocker Arm Nut Thread Size

3/8-24 in.

Screw-In Thread Depth

0.7

Shank Dia/Thread

3/8-24

Stud Height

1.75

Great price

best price and swift delivery.

Thank you, easy!!

Hope they fit my FLD 120,I have two trucks

Fast shipping and the product met all of my expectations.

Felt like I got the best pricing on this product A+

as described

I'm not going to comment on a part until I've got it installed and road tested. Delivery is too soon for this survey. You should wait a week before sending.

first time so far so good

Not only was our item cheaper, it arrived quickly. Will def. purchase from Autoplicity again! Thanks!

Great price for the item. Both internet and phone conversations were quick and knowledgeable.

Not only did they have an great price on my part, and reasonable shipping charges, they shipped it right away.<br>I know I will be checking them for future parts.

Product received as described. Fast shipping! I will definitely purchase from Autoplicity again.

Ordered a thule fairing for an audi roof rack. The whole process was easy and shipping was fast. Best price too. Definitely will use them again.

Prices were good and the order shipped promptly. The email notice of shipment was a little late. It came after the order had arrived.

Ordered Weathertech floor liner for wife's truck. Best price and quick delivery. Will order from Autoplicity.com again.<br><br>Happy New Year

Excellent! Order some spark plugs from here and they got here in 3 days! Wow!

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