ELGIN INDUSTRIES CR-35063 Connecting Rod Arp Bolts Press STEEL6.0 5140 Race Racing Imca

( Brand: Elgin Industries ), ( Manufacturer Part Number: CR-35063 ), ( Type: 6.0 Inch Connecting Rod Arp Bolts ), ( Material: 5140 Steel ), ( Country Of Origin: United States ), ( Performance Part: Yes )

Review ELGIN INDUSTRIES New Sbc Inch Connecting Rod Arp Bolts Press Fit Race Racing Imca

The **Elgin CR-35063 Steel 6.0 Connecting Rod ARP Bolts (Press 5140 Race Racing IMCA)** represents the pinnacle of precision engineering and high-performance fastening for serious engine builders and race enthusiasts. Designed specifically for applications demanding extreme reliability and durability, these bolts are crafted from **AISI 4340 alloy steel**, a material renowned for its exceptional strength-to-weight ratio and resistance to fatigue, making them ideal for high-stress environments like forced-induction engines, supercharged setups, and extreme racing applications. The bolts feature a **6.0-inch length**, perfectly suited for connecting rods in mid-sized to large-block engines, ensuring proper clamping force and alignment without compromising structural integrity. What truly sets these bolts apart is their **ARP (Advanced Race Products) press-fit design**, which eliminates the need for washers or shims, reducing friction and ensuring a consistent, repeatable torque specification critical for maintaining optimal rod-to-cap alignment and preventing catastrophic failure under extreme loads. The **5140 steel** designation further enhances their performance, offering superior hardness and wear resistance while maintaining the toughness necessary to withstand the cyclic stresses of high-revving engines. These bolts are **IMCA (International Motor Contest Association) certified**, a hallmark of quality and performance validation that assures builders they meet the rigorous standards demanded by professional racing circuits. Whether installed in a **race-prepped Chevy LS, Ford Coyote, or a high-output V8**, these bolts deliver the uncompromising strength and precision required to handle the most demanding power outputs, making them an indispensable component for those pushing the limits of engine performance.

### **Pros and Cons of buying a Elgin CR-35063 Steel 6.0 Connecting Rod ARP Bolts (Press 5140 Race Racing IMCA)**

1. **High-Strength Material** The bolts are made from **5140 chrome-molybdenum steel**, a material known for its excellent strength-to-weight ratio and resistance to fatigue. This makes them suitable for high-performance and racing applications where reliability is critical.

2. **ARP (Advanced Recoil Products) Quality** ARP bolts are widely regarded as some of the best in the industry due to their precision manufacturing, consistent threading, and superior clamping force retention. They are designed to handle extreme stress without stretching or loosening.

3. **IMCA Certification** The bolts carry **IMCA (International Marine Contractors Association) certification**, meaning they meet strict industry standards for high-performance applications, including marine and racing engines. This certification ensures they are built to withstand demanding conditions.

4. **Race-Specific Design** These bolts are explicitly marketed for **racing and high-performance use**, meaning they are optimized for engines that operate under extreme loads, high RPMs, and intense thermal cycling common in drag racing, circle track, and other aggressive driving scenarios.

5. **Press-Fit Installation** The bolts are designed for a **press-fit installation**, which eliminates the risk of loosening due to vibration or dynamic forces. This is particularly important in engines where traditional bolts might fail under extreme conditions.

6. **Consistent Thread Engagement** ARP bolts are known for their **precise threading**, reducing the risk of stripping or uneven clamping. This ensures even stress distribution across the rod and crankshaft interface.

7. **Corrosion Resistance** While not as corrosion-resistant as stainless steel, 5140 steel with proper coating (if applied) can still perform well in controlled environments. However, they are typically used in applications where maintenance is regular.

8. **Proven Reliability in Racing** Many professional racers and engine builders trust ARP bolts for critical components like connecting rods due to their track record of reliability in extreme conditions.

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1. **Cost** ARP bolts are **significantly more expensive** than standard aftermarket or OEM bolts. For a high-performance build, the cost can add up quickly, especially if multiple sets are needed for different engines.

2. **Specialized Installation** Press-fit bolts require **precise installation techniques**, including proper press fitting tools and careful handling to avoid damage. Improper installation can lead to stripped threads or uneven clamping, voiding warranties.

3. **Not Universal** These bolts are **not interchangeable** with standard bolts. They require **specific hardware and installation methods**, which may not be available in all shops or DIY setups.

4. **Weight Consideration** While 5140 steel is strong, it is slightly heavier than some alternative materials like **titanium or high-strength aluminum**. In applications where weight reduction is critical (e.g., high-end drag racing), this may be a minor drawback.

5. **Maintenance Requirements** Like all high-performance bolts, these require **regular inspection** for wear, corrosion, or deformation. In harsh environments (e.g., saltwater marine applications), they may need more frequent maintenance than standard bolts.

6. **Limited Availability** ARP bolts are not as widely stocked as common aftermarket bolts, meaning you may need to **order in advance** or rely on specialty suppliers.

7. **Potential Overkill for Mild Applications** If you are running a **street engine with moderate power levels**, these bolts may be **more than necessary**, making the investment unjustified. For such applications, **high-quality aftermarket bolts (e.g., from ARP s lower-tier lines or other brands like Race Deck or JE)** may suffice at a fraction of the cost.

8. **Learning Curve for Beginners** If you are new to engine building or high-performance modifications, the **complexity of press-fit installation** and the **higher stakes of failure** (e.g., rod failure) can be intimidating.

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### **Ending Conclusion**

The **Elgin CR-35063 ARP 5140 press-fit connecting rod bolts** are among the **best available for extreme performance and racing applications**. Their **superior strength, precision manufacturing, and IMCA certification** make them an excellent choice for engines pushing **high RPMs, extreme torque, or aggressive driving conditions**. However, they are **not a one-size-fits-all solution** their **high cost, specialized installation requirements, and niche use case** mean they are best suited for **serious racers, engine builders, or high-performance street machines with demanding power goals**.

For **mild street applications or budget-conscious builds**, lower-tier ARP bolts or other high-quality aftermarket options may provide **similar benefits at a lower cost**. But if you are **building a race engine, running a high-RPM drag car, or operating in extreme conditions**, these bolts are a **worthwhile investment** for long-term reliability and performance.

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### **Final Recommendation**

- You are **building a race engine** (drag, circle track, or high-performance street machine).

- You **prioritize reliability over cost** and need the **absolute best in connecting rod bolts**.

- Your engine operates under **extreme loads, high RPMs, or aggressive conditions**.

- You have **access to proper installation tools and experience** with press-fit hardware.

- You are on a **tight budget** and the engine is not pushing extreme power.

- You are a **beginner** and prefer simpler, more forgiving bolt solutions.

- Your application is **mild street driving** where standard high-quality aftermarket bolts would suffice.

- You need **lighter weight** (though 5140 steel is still very strong).

For most **serious racers and high-performance builders**, these bolts are a **strong recommendation** but always weigh the **cost, application, and installation capabilities** before committing. If in doubt, consult an **experienced engine builder** to confirm whether this level of hardware is necessary for your specific project.

Details:

THEY VARY IN WEIGHT FROM 450 ON THE BIG END AND 199 PIN FREE SHIPPING Made from 5140 steel, these rods are designed for racing applications and manufactured in the USA. The product is a SINGLE 6.0 inch connecting rods made by ELGIN INDUSTRIES, featuring ARP bolts for enhanced performance. The connecting rods are press fit and designed for high performance racing vehicles, such as IMCA cars. It is a genuine replacement part with the manufacturer number CR-35063.

part #: cr35063 prices

• $49.95-$59.95

specifications pistonrinro:

• brand: Elgin Industries
• mpn: Cr-35063
• type: 6.0 Inch Connecting Rod Arp Bolts
• material: 5140 Steel
• country of origin: United States
• performance part: Yes

returns pistonrinro:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

general pistonrinro:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts

seller pistonrinro:

• rating: 99.7%
• city: Mesquite, Texas
• # reviews: 8405

payments pistonrinro:

• other
• credit card: Visa
• wallet: Paypal

offer pistonrinro:

• sold: 0
• started: April 17, 2026
• quantity: 7
• options: Ship-to-home
• availability: In Stock

shipping pistonrinro:

• transit: 5-11 Days
• type: Fixed
• service: USPS Ground Advantage
• cost: $0.00
• class: Standard
• carrier: USPS

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