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ARP 208-4701 Head Stud Kit for Honda K20A Engine

Manufacturer

ARP

<h3>About ARP – Automotive Racing Products</h3><p>Few names carry as much weight in the performance fastener world as <strong>ARP</strong> — short for Automotive Racing Products. Back in 1968, racing enthusiast Gary Holzapfel noticed that many of his friends' broken engines were caused by fastener failure, and at the time no commercially available studs or bolts were up to the challenge — so he drew on his years of experience as a leading aerospace subcontractor and founded ARP. That problem-solving spirit has driven the company ever since.</p><p>From a backyard garage workshop, ARP has grown into a highly diversified manufacturer with 18 buildings across Southern California, totaling more than 275,000 square feet of forging, heat-treating, machining, quality control, finishing, and packaging facilities in Santa Paula and Ventura, California.</p><h3>Engineering That Goes Beyond &quot;Aerospace Quality&quot;</h3><p>ARP uses only top-quality materials — far above the usual &quot;aerospace quality&quot; others settle for — in a highly exacting manufacturing process to create fasteners with the strength and durability to last race after race. Fastener materials are available in 8740 Chrome Moly, ARP2000, and Custom Age 625+, each engineered for specific performance thresholds. In order to ensure optimum quality control, ARP controls all aspects of the manufacturing process entirely in-house — a discipline that has allowed it to build a reputation for &quot;zero defects&quot; quality throughout the industry.</p><p>Automotive Racing Products has achieved ISO 9001:2008 and AS9100 registration, certifications the company has maintained as a testament to its unwavering dedication to producing the highest quality fasteners available. ARP also operates an Aerospace Division and is one of the very few companies in the world fully licensed by the United States Government to manufacture MS-21250 fatigue-rated fasteners.</p><h3>Trusted by the World&apos;s Top Racing Programs</h3><p>ARP enjoys working relationships with professional engine builders and race teams across Formula 1, IndyCar, IMSA, NASCAR, NHRA, IHRA, Lucas Oil Late Model Dirt, and World of Outlaws — constant interaction that keeps ARP on the cutting edge of fastener technology. Whether you&apos;re building a weekend bracket racer or a full-time professional race engine, ARP has a solution engineered to hold things together under the most extreme conditions.</p><h3>ARP&apos;s Engine Fastener Lineup</h3><p>Today, ARP&apos;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. Among the most popular are <a href="/48-arp-engine-cylinder-head-bolt-set-10306">Engine Cylinder Head Bolt Sets</a>, <a href="/48-arp-engine-connecting-rod-bolt-5280">Engine Connecting Rod Bolts</a>, and complete <a href="/48-arp-engine-connecting-rod-5276">Engine Connecting Rods</a> — three categories that represent the critical fastening points where engine integrity is made or lost. ARP&apos;s High Performance series head bolt kits are rated at 170,000 psi — 15 percent stronger than Grade 8 fasteners — and are available with hex heads or reduced-wrenching 12-point heads that eliminate the need for valvetrain removal when re-torquing.</p><p>ARP stands behind its products indefinitely with respect to materials and workmanship, making every fastener a long-term investment in engine reliability rather than a consumable component.</p>

Part Number

208-4701
09/12/2036 4:30 AM
Sale Price

$170.60

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 208-4701 head stud kit is engineered specifically for Honda K20A engines found in the Acura RSX. These premium head studs provide superior cylinder head-to-block clamping force, making them essential for high-performance applications including high-compression builds, turbochargers, superchargers, and nitrous oxide systems.

Premium Construction and Manufacturing:

  • Manufactured from premium grade 8740 chromoly steel alloy, far exceeding aircraft-quality materials
  • Precision heat-treated to 200,000 psi tensile strength for maximum durability
  • Centerless ground through approximately ten successive cuts to ensure near-perfect concentricity and straightness
  • Thread rolled after heat-treat process, providing 10 times better fatigue strength than pre-heat-treat threading
  • Specially undercut shorter studs equalize stretch characteristics for consistent clamping force across all fasteners

Performance Benefits:

  • Superior clamping force prevents head gasket failure in high-boost and high-compression applications
  • Precise tolerances allow cylinder heads and gaskets to align and install effortlessly
  • Consistent clamping force compensates for head gasket compression, ensuring optimal sealing
  • Dramatically improved fatigue resistance over OEM head bolts

ARP head studs are the choice of professional Sport Compact and Import racers who demand reliable head gasket sealing under extreme conditions. Each kit includes studs, washers, and premium ARP fastener assembly lubricant.

Products specifications

Cut to Fit

No

Fastener Finish

Black oxide

Fastener Material

8740 chromemoly

Fastener Style

Stud

Head Style

12-point

Quantity

Sold as a kit.

Washers Included

Yes

Shipped really fast, haven't even had a chance to use the paint yet.

Easy as can be to order!

No complaints here. Thanks for the great product at a great price. Service was wonderful.

I would definitely order again. Part fit as expected

So far so good!

*

Fast and easy

Springs came in on time, and seem to be great quality so far!

So easy you'll think you missed something.

nice site. all of the order was well packaged, no damage. i will be a return buyer.

easy website to use and find your part

Image of product is wrong but it did say image may be different. Part number should be correct for heater hose assembly, other wise site seems very good and understandable. Did receive correct part and very fast deliver, ordered Monday and received Wednesday, will probably use site again.

I ordered a chrome brake light cover from Autoplicity 3 days ago and received it today. Their add showed the piece I wanted clearly and it arrived today exactly as I expected. It looks great on my new Dodge truck. Thanks for the great service!

Autoplicity has an abundance of name brand parts at unbeatable prices. Customer service was also great to deal with. Receipt and tracking info was provided promptly.

Good

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