EAGLE SPECIALTY PRODUCTS Crankshaft Seal Int Bal Forged 793348007878 EAG4.3464E 1-PC Steel 4.000 5.7 6.0L

( Brand: Eagle Specialty Products ), ( Manufacturer Part Number: 4.3464E ), ( Part Type: Seal Crankshaft ), ( Ipn: Eag4.3464e 11 ), ( Seller: Summit Racing Equipment ), ( UPC: 793348007878 )

Review EAGLE SPECIALTY PRODUCTS Crankshaft 1-pc Seal Int Bal Forged Steel 4.000 Inch Stroke Chevy 5.7 6.0l fits 2011

The **Eagle Specialty 4.3464E 1-Piece Seal Intake Balancer for Forged Steel 4.000" Crankshaft** is a precision-engineered component designed exclusively for high-performance applications in Chevrolet s legendary **5.7L (350 cubic inch) and 6.0L (327 cubic inch) LS-series engines**, including the iconic **LS1, LS6, and LS7** platforms. Crafted from **high-grade forged steel**, this balancer is built to withstand the extreme stresses of aggressive driving, forced induction, and high-revving scenarios, making it an ideal upgrade for enthusiasts pushing their engines beyond stock limitations. The **4.000" crankshaft interface** ensures a perfect fit with the crankshaft s journal diameter, eliminating any potential for slop or misalignment that could lead to premature wear or failure. This **one-piece design** eliminates the need for multiple components, reducing friction and improving overall durability while maintaining optimal rotational balance critical for maintaining smooth operation and longevity in both naturally aspirated and turbocharged setups.

What truly sets this balancer apart is its **intake-side sealing mechanism**, which features a **high-performance rubber or composite seal** (depending on the specific variant) that resists oil migration and maintains a tight, consistent seal under high G-forces and thermal cycling. This design minimizes oil leakage into the intake manifold, preventing contamination of the air intake system and ensuring clean, unrestricted airflow essential for maximizing horsepower and torque in performance applications. The **precision-machined housing** is engineered to align flawlessly with the engine s harmonic balancer interface, reducing vibration and enhancing drivability while protecting critical engine components from excessive strain.

Ideal for **restoration projects, high-mileage engines, or performance builds**, this balancer is a direct replacement for OEM units, offering superior strength and reliability without compromising on fitment. Whether you're running a **stock LS engine, a supercharged setup, or a heavily modified turbocharged powerplant**, this **Eagle Specialty balancer** delivers the robustness and precision needed to handle the demands of modern high-performance driving. Built to last, it s a smart investment for anyone seeking to eliminate common issues like **oil leaks, excessive vibration, or premature wear** while ensuring peak performance and engine protection.

### **Pros and Cons of buying a Eagle Specialty 4.3464E Crankshaft (1-Piece Seal, Intake Balanced, Forged Steel) for a 4.000" Chevy 5.7L/6.0L Engine**

1. **High-Quality Forged Steel Construction**

- Forged steel crankshafts are significantly stronger and more durable than cast iron cranks, reducing the risk of catastrophic failure under heavy loads or high RPM.

- They maintain integrity under extreme stress, making them ideal for high-performance applications, towing, or heavy-duty use.

2. **Intake Balanced Design**

- Intake balancing reduces vibration and improves smoothness, particularly beneficial in high-performance or turbocharged applications where crankshaft harmonics can cause excessive shaking.

- This helps prolong the life of the engine by reducing stress on mounts, rods, and bearings.

3. **1-Piece Seal Design**

- A one-piece crankshaft eliminates the potential failure points associated with two-piece designs (where the crank may split at the seal area).

- This design is more reliable for forced induction or high-torque applications where stress concentrations are a concern.

4. **Precision Machining and Balancing**

- Eagle Specialty cranks are precision-machined and dynamically balanced, ensuring smooth operation and longevity.

- The 4.000" stroke is a common and well-supported dimension, making maintenance and parts availability easier.

5. **Compatibility with 5.7L (350ci) and 6.0L (L96/LT1) Engines**

- This crankshaft is designed to fit both the 5.7L (pre-2003) and 6.0L (post-2003) Chevy V8 engines, offering flexibility for builds or restorations.

- It maintains the same bore spacing and rod journal dimensions as stock cranks, ensuring compatibility with most stock and aftermarket components.

6. **Warranty and Reputation**

- Eagle Specialty is a well-regarded manufacturer in the performance and restoration market, offering warranties on their products.

- Their cranks are often used in professional engine builds, indicating reliability.

7. **Potential for Increased Power**

- A forged crankshaft can handle higher RPMs and torque better than stock cranks, making it suitable for forced induction (turbo/supercharger) or nitrous applications.

- If paired with a high-performance rod and piston setup, it can support significant power gains.

---

1. **Higher Upfront Cost**

- Forged steel crankshafts are significantly more expensive than stock or aftermarket cast iron cranks. The cost may range from **$1,200 to $2,000 **, depending on additional machining (e.g., grinding, balancing, or custom features).

- This can be a major investment, especially for budget-conscious builds or casual enthusiasts.

2. **Not Necessary for Mild Applications**

- If the engine is used for light-duty driving, street use, or low-power modifications (e.g., mild tuning without forced induction), a stock or aftermarket cast iron crank may suffice.

- The extra cost may not be justified unless the engine is subjected to heavy loads, high RPMs, or aggressive modifications.

3. **Requires Professional Installation**

- Installing a crankshaft, especially in a rebuilt engine, requires specialized tools, experience, and precision. DIY installation is risky and often not recommended.

- Labor costs for installation (including balancing and torque specifications) can add **$500 $1,500 **, depending on the shop.

4. **Potential for Overkill in Some Cases**

- Some builders may opt for a forged crank when a high-quality aftermarket cast iron crank (e.g., from JE, Crane, or Eagle s own cast options) would be sufficient.

- Cast iron cranks are cheaper and still capable of handling **300 500 hp** in most cases, making forged cranks unnecessary unless pushing **500 hp or forced induction**.

5. **Limited Aftermarket Support for Customization**

- Unlike stock cranks, forged cranks may not have as many aftermarket rod bolt patterns or custom machining options available.

- If future modifications (e.g., longer rods, custom stroke) are planned, compatibility may become an issue.

6. **Weight Considerations**

- Forged steel cranks are heavier than cast iron, which can slightly reduce engine responsiveness in high-revving applications.

- However, the weight difference is minimal compared to the benefits in durability.

7. **Longer Lead Times**

- Custom-machined cranks may have longer lead times compared to stock or mass-produced aftermarket parts.

- This could delay engine builds if the crank is a critical bottleneck.

---

### **Conclusion and Recommendation**

#### **Who Should Buy This Crankshaft?**

- **High-performance builds** (e.g., **500 hp, forced induction, nitrous, or heavy towing**).

- **Engines subjected to extreme stress** (e.g., turbocharged, supercharged, or high-RPM applications).

- **Builders prioritizing longevity and reliability** over cost savings.

- **Restorations where stock cranks are worn or damaged**, and a durable, high-quality replacement is needed.

- **Enthusiasts planning future power increases** who want a crankshaft that can handle future modifications.

#### **Who Should Avoid This Crankshaft?**

- **Budget-conscious builders** who only need **300 400 hp** on stock or mild aftermarket components.

- **Casual drivers or weekend project cars** where the engine will not see heavy use.

- **Those who prefer simpler, cheaper alternatives** (e.g., high-quality aftermarket cast iron cranks like JE or Crane).

- **Builders who may not have the budget for professional installation and machining**.

If you are **building a high-performance 5.7L/6.0L Chevy engine** (especially with forced induction, nitrous, or aggressive tuning) and want the **ultimate in durability and reliability**, the **Eagle Specialty 4.3464E forged steel crankshaft is an excellent choice**. Its **intake balancing, one-piece design, and forged construction** make it one of the best options for extreme applications.

However, if your build is **moderate in power goals** (under **500 hp without forced induction**) and you are working within a **tighter budget**, consider a **high-quality aftermarket cast iron crank** (e.g., JE, Crane, or Eagle s own cast options) instead. These will provide **similar strength for most applications** while saving **hundreds or thousands of dollars**.

**For most street/strip builds under 500 hp, a forged crank is overkill unless you plan significant future power increases.** But if you want **peace of mind and the ability to push extreme power**, the Eagle Specialty forged crank is a **top-tier investment**.

Details:

Stroke, Chevy, 5.7, 6.0L, Each. Please hover mouse to image. Crankshaft, 1-Piece Seal, Internal Balance, Forged 4340 Steel, 4.000 in.

part #: 793348007878 prices

• $995.99-$1155.95

specifications cranshafengin:

• for makes: Chevy, Eagle
• for years: 2011
• brand: Eagle Specialty Products
• mpn: 4.3464e
• part type: Seal Crankshaft
• ipn: Eag4.3464e 11
• seller: Summit Racing Equipment
• upc: 793348007878

returns cranshafengin:

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

shipping cranshafengin:

• service: Economy
• transit: 3-5 Days
• type: Fixed
• cost: $0.00
• class: Economy

offer cranshafengin:

• sold: 0
• availability: In Stock
• started: May 25, 2026
• quantity: 3
• options: Ship-to-home

general cranshafengin:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

payments cranshafengin:

• wallet: Apple-pay
• other
• credit card: Visa

seller cranshafengin:

• city: Tallmadge, Ohio
• rating: 99.6%
• # reviews: 1147620

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