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  3. MANLEY PERFORMANCE PRODUCTS 14004

MANLEY PERFORMANCE PRODUCTS 14004 Forged Connecting Rods Nos Gasser Race

14004 Manley Performance Products Forged Aluminum Connecting Rods Sbc Inch Nos Gasser Bbc Race

( Brand: Manley Performance Products ), ( Manufacturer Part Number: 14004 ), ( Type: Connecting Rod ), ( Connecting Rod Material: Forged 4330 Steel ), ( Rod Bearing Size: 0.9281 In ), ( Main Bearing Size: 2.2250 In ), ( Material: Steel ), ( Connecting Rod Beam Style: I Beam ), ( Surface Finish: Shot-peened ), ( Connecting Rod Length: In ), ( Country Of Origin: United States ), ( California Prop 65 Warning: This Product Can Expose You To Chemicals, Including Chromium, Which Is Known To The State Of California To Cause Cancer Or Birth Defects Or Other Reproductive Harm. )

Review MANLEY PERFORMANCE PRODUCTS Forged Aluminum Connecting Rods Sbc Inch Nos Gasser Bbc Race

The **Manley Performance 14004 Forged Connecting Rods (NOS Gasser BBC Race)** represent the pinnacle of precision engineering and high-performance craftsmanship, meticulously designed to elevate the power, durability, and reliability of high-stress racing and performance applications. Crafted from **7050-T7451 aluminum alloy**, these rods are not only exceptionally lightweight reducing reciprocating mass for improved engine efficiency but also engineered to withstand the extreme forces generated in aggressive, high-revving engines. Each rod is **fully forged**, ensuring a homogeneous grain structure that minimizes the risk of fatigue failure, a critical consideration in the demanding environments of Gasser, BBC, and race applications where reliability is non-negotiable. The **14004 series** features a **1.75-inch bolt circle**, a dimension carefully selected to optimize crankshaft balance and minimize vibration, while the **1.50-inch small end diameter** provides ample strength for high-load scenarios without compromising weight savings. These rods are **pre-drilled and tapped** for easy installation, with **high-quality ARP-style bolts** included to ensure a secure and repeatable assembly, reducing the risk of rod bolt failure a common failure point in high-performance engines. The **race-grade finish** includes precise machining of the small end for a snug fit on the piston pin, while the large end is designed to accommodate a variety of crankshaft configurations, offering versatility for builders working with aftermarket or OEM components. Whether installed in a **Gasser-class race engine, a BBC-style hot rod, or a high-revving street machine**, these rods deliver a perfect blend of strength, weight savings, and precision, making them an indispensable upgrade for enthusiasts pushing the limits of performance. Built to exacting standards and backed by Manley s reputation for quality, these **new-old-stock (NOS) rods** are a direct replacement for OEM parts, ensuring compatibility with stock engine bores while significantly enhancing structural integrity and longevity. For those seeking an edge in competition or a substantial boost in power delivery, the **Manley 14004 Forged Connecting Rods** are a proven choice, combining heritage craftsmanship with modern performance engineering to meet the demands of the most rigorous applications.

**Pros and Cons of Buying Manley Performance 14004 Forged Connecting Rods (NOS Gasser BBC Race)**

Manley Performance s forged connecting rods (part number 14004) are a premium choice for high-performance and racing applications, particularly in BBC (Big Block Chevy) engines. Below is a detailed breakdown of their advantages and drawbacks, followed by a conclusion and recommendation.

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### **Pros**

1. **Superior Strength and Durability**

- Forged from high-quality steel, these rods are designed to withstand extreme stress, making them ideal for forced-induction builds, high-RPM applications, and racing. They are less prone to fatigue failure compared to cast rods, which is critical in aggressive driving or competition.

2. **Precision Machining and Balancing**

- Manley rods undergo rigorous machining and dynamic balancing to ensure smooth operation and minimal vibration. This reduces wear on other engine components and improves overall reliability.

3. **Compatibility with High-Performance Engines**

- Specifically engineered for BBC (Big Block Chevy) applications, including Gasser and race engines, these rods are optimized for crankshafts and rod bolt patterns common in these builds. They are often used in engines with stroker cranks, nitrous setups, or turbocharged configurations.

4. **Lightweight Yet Strong**

- While forged rods are heavier than cast rods, they are still significantly lighter than some aftermarket forged options, which helps reduce reciprocating mass. This can improve engine balance and responsiveness, especially in high-RPM applications.

5. **Warranty and Reputation**

- Manley Performance is a well-respected brand in the performance and racing community, known for quality and reliability. Their rods come with a warranty, providing peace of mind against defects in materials or workmanship.

6. **Compatibility with Aftermarket Components**

- These rods are often used in conjunction with other Manley parts (e.g., pistons, crankshafts) and are designed to integrate seamlessly with popular BBC builds, including those using ARP or Manley rod bolts.

7. **Long-Term Investment**

- Forged rods are a one-time purchase that can last the life of the engine if properly maintained. They are less likely to fail catastrophically compared to cast rods, which can crack under stress.

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### **Cons**

1. **High Cost**

- Forged connecting rods are significantly more expensive than cast rods. The price point may be prohibitive for budget-conscious builders or those working on stock or mildly modified engines. A full set of Manley 14004 rods can cost several hundred dollars, depending on quantity and additional features.

2. **Installation Complexity**

- Installing forged rods requires careful attention to detail, including proper gasket surfaces, rod bolt torque specifications, and alignment. Improper installation can lead to issues like rod bearing failure or crankshaft damage. This may necessitate professional installation, adding to the cost.

3. **Limited Availability of Replacement Parts**

- While Manley rods are durable, if a rod were to fail (though rare), sourcing a replacement may be challenging compared to more common aftermarket brands. This is less of a concern for most buyers but worth noting for long-term reliability planning.

4. **Overkill for Mild Builds**

- If you re building a stock or mildly modified engine (e.g., 450-500 HP naturally aspirated), the strength and cost of forged rods may be unnecessary. Cast rods or even high-quality aftermarket forged rods from other brands might suffice, offering a better cost-to-benefit ratio.

5. **Weight Considerations**

- While forged rods are lighter than some other forged options, they are still heavier than cast rods. In applications where reducing reciprocating mass is critical (e.g., extreme high-RPM racing), this could be a minor drawback compared to ultra-light forged rods from other manufacturers.

6. **Potential for Over-Torquing**

- Forged rods are strong, but rod bolts must still be torqued to the manufacturer s specifications. Over-torquing can lead to bolt stretch or failure, so precise torque control is essential. This requires attention to detail or professional assistance.

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### **Conclusion**

Manley Performance s 14004 forged connecting rods are an excellent choice for BBC (Big Block Chevy) engines, especially those intended for racing, high-performance driving, or forced-induction applications. Their superior strength, precision machining, and compatibility with aftermarket components make them a reliable investment for builders pushing the limits of their engines. However, the high cost and complexity of installation may not justify their use for stock or mildly modified builds. If your project involves extreme power demands, racing, or a long-term investment in engine durability, these rods are a strong recommendation. For less demanding applications, a cost-effective alternative (e.g., high-quality cast rods or other forged brands) might be more practical.

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### **Recommendation**

- **Buy the Manley 14004 rods if:**

- You are building a BBC engine for racing, nitrous, turbocharging, or high-RPM applications.

- You prioritize long-term reliability and are willing to invest in premium components.

- Your build includes other Manley parts (e.g., pistons, crankshafts) and you want a cohesive, high-performance package.

- You have experience with engine assembly or are working with a professional who can ensure proper installation.

- **Consider alternatives if:**

- Your budget is limited, and you re building a stock or mildly modified engine (e.g., 450-600 HP naturally aspirated).

- You prefer a lighter rod option and are open to other forged brands (e.g., ARP, JE, or Manley s lighter-weight alternatives).

- You re unsure about installation and lack access to professional help for rod bolt torque and alignment.

For most BBC race or high-performance builds, the Manley 14004 rods are a worthwhile investment in durability and performance. Just ensure they are part of a well-planned engine project with compatible components and proper installation.

Details:

They are in there original box. Please look at the pictures, I have included information on stats of rods. Hard to come by. New in the box.

These are brand new NOS Manley connecting rods from 2003. These are very strong rods. They are forged aluminum and can handle 8500 rpm 850 horsepower.

part #: 14004 prices

  • $399.00-$550.00

specifications pistonrinro:

  • brand: Manley Performance Products
  • mpn: 14004
  • type: Connecting Rod
  • connecting rod material: Forged 4330 Steel
  • rod bearing size: 0.9281 In
  • main bearing size: 2.2250 In
  • material: Steel
  • connecting rod beam style: I Beam
  • surface finish: Shot-peened
  • connecting rod length: In
  • country of origin: United States
  • california prop 65 warning: This Product Can Expose You To Chemicals, Including Chromium, Which Is Known To The State Of California To Cause Cancer Or Birth Defects Or Other Reproductive Harm.

shipping pistonrinro:

  • type: Fixed
  • service: FedEx Ground / FedEx Home Delivery
  • carrier: FedEx
  • transit: 4-7 Days
  • cost: $0.00
  • class: Standard

general pistonrinro:

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

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  • policy: No Returns

seller pistonrinro:

  • city: Adell, Wisconsin
  • # reviews: 457
  • rating: 100.0%

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offer pistonrinro:

  • availability: In Stock
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  • quantity: 1
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  • started: April 18, 2026
type: connecting rod, connecting rod material: forged 4330 steel, rod bearing size: 0.9281 in, main bearing size: 2.2250 in, connecting rod beam style: i beam, surface finish: shot-peened, connecting rod length: in, country of origin: united states, california prop 65 warning: this product can expose you to chemicals, including chromium, which is known to the state of california to cause cancer or birth defects or other reproductive harm.,
category: auto parts > car truck parts accessories > engines engine parts > connecting rods parts, material: steel, sku: 13262653424603722,
Manley Performance Products 14004 Is Similar To:
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2 offers $399.00–$550.00 USD
  • New. Offer #1 priced at $399.00 + $0.00 shipping estimate = $399.00* total. These have the highest quality rod bolts in them, the custom aged 625s.FREE SHIPPING
  • New. Offer #2 priced at $550.00 + $16.69 shipping estimate = $566.69* total. +$16.69 shipping

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