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ARP 234-4321 High Performance Cylinder Head Stud Kit Chrome Moly - 8740

(Chevrolet Camaro 1967-75, 1987-2001, Corvette 1955-65, 1991-2001, C1500 1988-95, Chevelle 1969-73, Blazer 1973-74, 1987-94 + 15 more models)

Manufacturer

Picture for manufacturer ARP

Part Number

234-4321
18 reviews
Sale Price

$279.43

1 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The ARP 234-4321 is a high-performance cylinder head stud kit engineered for serious engine builders who demand maximum reliability and clamping force. Manufactured from premium 8740 chrome moly steel and heat-treated to 200,000 psi, these studs deliver superior strength and fatigue resistance for high-performance and racing applications.

Key Features:

  • Premium 8740 chrome moly alloy rated at 200,000 psi tensile strength
  • 12-point head design for secure engagement and easy installation
  • Precision heat-treated vertically in racks for consistent properties throughout
  • Centerless ground after heat-treat for exceptional straightness and concentricity
  • Thread rolled after heat-treat for 10x better fatigue strength
  • Includes hardened parallel-ground washers for even load distribution
  • Wide area flanged head eliminates need for valve train removal during retorquing
  • Undercut shorter studs (where applicable) equalize stretch for more consistent clamping

Why Choose Studs Over Bolts:

Head studs provide superior clamping accuracy compared to bolts because they stretch only along the vertical axis when torqued. Bolts experience both torsional and tensile forces simultaneously, which can lead to inconsistent clamping. Studs also simplify engine assembly by allowing cylinder heads and gaskets to glide into perfect alignment. The undercut design on shorter studs compensates for head gasket compression, helping prevent blown gaskets and ensuring optimal engine sealing.

Installation Notes:

Install studs finger-tight in a relaxed state—never crank them in using a jammed nut. Apply torque only to the nut, allowing the stud to stretch uniformly. Always re-torque after initial engine run-in to compensate for head gasket compression.

Trusted by professional engine builders across all forms of motorsports, ARP head studs represent the gold standard in cylinder head fastening systems. Each stud is stamped with the ARP logo as your assurance of zero-defect quality.

Products specifications

Fits

Chevrolet Camaro 1967-75, 1987-2001, Corvette 1955-65, 1991-2001, C1500 1988-95, Chevelle 1969-73, Blazer 1973-74, 1987-94, C10 Pickup 1968, 1972, 1974-76, 1978-81, Caprice 1969-76, 1980-85, 1989-96, C3500 1988-95 + 12 more models

Cut to Fit

No

Fastener Finish

Black oxide

Fastener Material

8740 chromemoly

Fastener Style

Stud

Head Style

12-point

Notes

Fits cylinder heads with 3/8 in. holes, casting numbers 10134363, and 10134364.

Quantity

Sold as a kit.

Washers Included

Yes

Excellent price and easy to use website.

So far so good,1st time using ya

Quick to find part, good price, reasonable shipping. Website is easy to use - that's a real plus.

Camber kit was not as pictured it showed rear camber kit but was only a ball joint for the front camber kit and still have yet to receive sway bar link bushings

Na

Very easy process. Item was well packed would recommend

Fast shipping

It was fast and easy.

ldldldldl

I received excellent customer service from Autoplicity. I emailed them a question about my order and received an answer within an hour or so. I was very happy with this company

Product was the cheapest I could find. One other store was cheaper but did not have my product in stock. Autoplicity shipped within 2 days and the product arrived as described. I am happy with my purchase and would do business with Autoplicity again. The only thing I marked them on was that I wish they shipped within 1 day instead of 2.

Excellent prices + great customer service = people I want to do business with... period.

I will definitely do more shopping with Autoplicity....great prices and quick shipments.

Purchased a roll-n-lock bed cover. Ordering was easy and it was the lowest price by far that I could find online. Shipped within 48 hrs as informed. I have not yet rec'd it so I cannot comment on the packaging just yet. Sofar a good online purchase experience.

My first order from autoplicity. Good products and good prices. Received an order confirmation right away and a shipping confirmation within 1 business day. Have not received my order yet but if all goes as expected I shall be a return customer.

Excellent and very quick service. I could not find this product in stock from any other supplier so I kept hunting. I found Autoplicity and from now on they are the first company I will try. Thank you.

great price $60.00 less than summit will shop here again!

Autoplicity, was very easy to use, very fast, and an enjoyable experience. I would recommend to my closest friends!!

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