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ARP 204-6005 Connecting Rod Bolt Kit ARP2000 Pro Wave-Loc Series

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

204-6005
09/12/2036 5:38 AM
Sale Price

$266.67

In Stock (7)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The ARP 204-6005 is a complete connecting rod bolt kit featuring ARP2000 alloy steel construction with the innovative Wave-Loc design. ARP has earned its reputation as the industry standard for connecting rod fasteners, with manufacturers proudly advertising ARP bolts as original equipment on their rods. The reason is simple: the connecting rod bolt has historically been the weak link in the assembly, and ARP's engineering and manufacturing expertise delivers unmatched reliability and strength.

Why ARP Rod Bolts Are Superior:

  • Testing demonstrates up to 10 times the fatigue strength compared to competitor fasteners
  • ARP2000 alloy steel heat-treated to achieve 220,000 psi tensile strength
  • Wave-Loc design provides interference fit (.001 to .005) for optimal rod and cap alignment
  • Threads rolled after heat treatment for maximum fatigue resistance
  • Each bolt proudly stamped with the ARP name as assurance of quality

Manufacturing Excellence:

  • Forged in-house using premium quality materials
  • Heat-treated on vertical racks ensuring complete 360-degree penetration
  • Precision CNC-machined to exacting specifications
  • Post heat-treat thread rolling increases fatigue life up to 10 times

Wave-Loc Technology Advantages:

  • Wave-Loc surface contacts rod and cap for superior alignment and reduced fluctuating stress
  • Accommodates wide range of OEM rod bolt hole tolerances with consistent snug fit
  • Patented Wave-Loc surface design optimizes material grain flow compared to knurled bolts
  • Smooth contact surface virtually eliminates galling and scoring of rod material
  • No sharp edges or stress risers found in knurled designs

About ARP2000 Material:

ARP2000 is an advanced alloy steel engineered to be heat-treated to higher levels than traditional 8740 chrome moly, producing greater strength while maintaining excellent fatigue properties. With a safe working tensile strength of 220,000 psi, ARP2000 delivers superior clamping loads for demanding racing applications. This material is widely used in short track and drag racing as an upgrade from chrome moly in both steel and aluminum connecting rods. When properly installed, ARP2000 resists stress corrosion and hydrogen embrittlement.

Important Maintenance Note:

Monitor bolt stretch regularly and replace any bolt that has permanently elongated by .0005 inch or more. This simple inspection practice ensures continued reliability and prevents potential failure.

This complete kit includes all necessary rod bolts for your application. ARP's commitment to quality means you're getting fasteners specifically designed and optimized for reliability in high-performance and racing environments.

Products specifications

Bolt/Stud Head

H Style

Cap Retention Style

Thru-bolt

Connecting Rod Bolt Material

8740 chromemoly steel

Connecting Rod Manufacturer

Stock

Fastener Yield Strength (psi)

200,000 psi

Nuts Included

Yes

Quantity

Sold as a set of 12.

Rod Bolt Head Style

H

Rod Bolt Nut Style

Hex

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