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ARP 234-4507 High Performance Head Stud Kit Chrome Moly Undercut - 8740

Manufacturer

Picture for manufacturer ARP

Part Number

234-4507
10 reviews
Sale Price

$242.84

Estimated ship date Friday, November 20

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 234-4507 is a high-performance head stud kit engineered for serious engine builders who demand absolute reliability. Built from premium 8740 chrome moly steel and rated at 200,000 psi tensile strength, these studs provide superior clamping force and fatigue resistance compared to standard head bolts.

Advanced Manufacturing Process:

  • Precision heat-treated vertically in racks to ensure complete and uniform heat penetration throughout each stud
  • Centerless ground after heat-treat for exceptional concentricity and straightness, ensuring perfect alignment of gaskets and cylinder heads
  • Thread rolled after heat-treat for approximately 1000% better fatigue strength compared to pre-heat-treat threading
  • Undercut design on shorter studs equalizes stretch characteristics for more consistent clamping force

Key Benefits:

  • Hex head design for reliable installation and torquing
  • Superior clamping consistency helps prevent head gasket failure
  • Easier engine assembly with assured proper head and gasket alignment
  • More accurate torque loading compared to head bolts, as studs stretch only on the vertical axis without rotational stress
  • Includes hardened parallel-ground washers for even load distribution

Studs should be installed finger-tight in a relaxed mode, never cranked down with a jammed nut. This allows the fastener to stretch purely along the vertical axis when torque is applied to the nut, providing optimal and consistent clamping force. Always re-torque after initial engine run-in to compensate for head gasket compression.

Each stud is marked with the ARP stamp as assurance of quality and adherence to ARP's zero-defect manufacturing standards. Trusted by professional engine builders across all forms of racing for competition powerplants that demand the ultimate in reliability.

I got the part I ordered and will be having someone install it soon looks just fine and I love the chat feature as well.. thinking about buying brake shoes now.. a lot of savings

Great prices & fast shipping.

They had the best price anywhere on the items I ordered(Recon Lights). Prompt emails and accurate tracking via UPS shipping. I'm pleased and will order more items now that I know they're "legit". Thanks Autoplicity!<br><br>Nick C.

GOOD SERVICE, FAST SHIP, CHEAP PRICE

Thought I had an issue with the customer service, and they worked it out PROMPTLY! That's a good customer Service relationship!<br>They even agreed to credit me my shiiping for a slight mistake they made!<br>VERY HAPPY!

Easy to do business with BEST PRICE anywhere!! Shipped and arrived quickly

I ordered this product and Wednesday in the morning and it was on my door step Thursday morning with regular shipping. The ordering process was super easy and the price was $35 cheaper than any other online retailer. The Rack is awesome, easy to assemble took me about 20 minutes by myself, put on my jeep hooked up the bikes and off I went, fantastic design, I highly recommend the Rola NV2 bike rack and highly recommend Autoplicity

Not sure if they overlooked my order but I didn't get my shipping info (3 days after ordered) until I emailed asking for status update. I received a response the following day and all my items ordered came 2 days later...much faster than I had anticipated considering the "delay" or lack thereof (5 days total). Long story short...items are as described, best prices (from what I can researched online for same items/brand) and resonable shipping prices. the selection and brand(s) offered were somewhat limited for my specific needs, otherwise I would've ordered more.

I was trying to locate a hi volocity radiator fan and for it at Autoplicity at a very good price. The item was shipped fairly quickly concidering it most likely had to come from the manufacturer. Thanks for your help.

By far they had the cheapest prices. I made a mistake on my order and they were able to switch it out for the correct item before it shipped. Amazing guest service over the phone, will def shop again with their low prices.

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