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ARP 300-8243 Perma-Loc Rocker Arm Adjuster Set Thread - 3/8-24 16-Pack

Part of: ARP Perma-Loc Rocker Arm Adjuster Set Thread

Other options in this family: ARP 300-8245

Manufacturer

Picture for manufacturer ARP

Part Number

300-8243
14 reviews
Sale Price

$89.53

In Stock (6)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

ARP's patented Perma-Loc rocker arm adjusters eliminate the constant need to re-adjust valvetrain components in high-performance engines. Unlike conventional poly locks that require frequent tightening, these premium adjusters feature advanced engineering that ensures they stay locked in position under the most demanding conditions.

Key Features:

  • Forged from premium 8740 chrome moly steel and heat-treated throughout to 190,000 psi tensile strength—not just case hardened like competitors
  • Precision CNC-machined threads cut exactly perpendicular to the adjuster bottom for even seating and 360-degree pressure distribution
  • Flush-ground bottom seats evenly on rocker arm, while flush-machined set screw tip provides optimum contact on the rocker stud
  • Compact 12-point head with shouldered stop holds your wrench in position while you tighten the Allen set screw—no special tools required
  • Designed specifically for aluminum rocker arms with 3/8-24 thread size, .550" body diameter, and 1.200" overall length

The Perma-Loc design addresses the root causes of adjuster failure: full heat treatment eliminates thread movement under stress, perpendicular thread machining prevents cocking and uneven loading, and the flush set screw design maximizes contact area. Each package includes sixteen adjusters.

Products specifications

For Use with Stud Girdle

No

Minimum Rocker Slot Width (in)

0.550 in.

Outside Diameter (in)

0.550 in.

Overall Height (in)

1.200 in.

Quantity

Sold as a set of 16.

Rocker Arm Nut Style

Polylock

Rocker Arm Style

Full roller

Rocker Stud Thread Diameter

3/8-24 in.

Size

1.2 x 0.55

Thread

3/8-24

Very easy and quick.

Thank you for the good service

No issues

Correct item fit perfectly

1st time using them Great price, great shipping. Will definitely use again

Autoplicity.com is Excellent. Excellent Products & delivery.

Parts were actually in-stock unlike every other retailer I tried. Quick shipping too.

Simple to execute. The order came unbelievably fast.

Recent purchased new Hawk HPS brakes for my 2010 Hyundai Genesis Coupe 3.8 Track.<br><br>The order was processed quickly, packaged very well, and was the correct items I had ordered. <br><br>Not only did I experiece great customer service and quick shipping/processing, Autoplicity also had the LOWEST price of any vendors for these parts I could find online.<br><br>Great service + Great pricing = Match made in heaven!

The best price I could find and it arrived in 2 days! I'll be doing business again.

Had problems using the search tool so I called direct. They helped locate Air Lift shocks I needed and told me that I.E. browser is sometimes a problem. They were helpful and my items got shipped the next business day.

Easy and quick check out

Highly recommend ordering from this company. I was in deep search for a product that everybody else told me I wouldn't find until next year (e.g. 4 wheel parts). Autoplicity knew someone that had the product and made the transaction as seamless as possible. I know where to look for future orders. <br><br>One very happy customer!

really fast delivery!<br>Had exactly the products i was looking for in stock.

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