EAGLE B15404L03053 Block Strip Rotating Ci Rear 793348805610 383

( Brand: Eagle ), ( Manufacturer Part Number: B15404L03053 ), ( Part Type: Block Strip ), ( Country Of Origin: Chn ), ( UPC: 793348805610 )

Review EAGLE Small Block Chevy And Strip Rotating Assembly 383 Ci Piece Rear fits STREET

The **Eagle B15404L03053 Block Chevy Street Strip Rotating 383 CI Rear** is a meticulously crafted, high-performance engine block designed for enthusiasts seeking a balance of raw power, durability, and customization in their Chevy-powered street strip or drag applications. Built from premium **cast iron**, this block features a **383 cubic-inch displacement** when paired with the appropriate crankshaft and pistons, offering a robust foundation for both stock and modified builds. The **rear-mount design** ensures optimal crankshaft alignment and reduced vibration, making it ideal for high-RPM applications where smooth operation and longevity are critical. This block is engineered with **precision machining**, including **interference-fit cylinder bores** that enhance structural integrity and minimize distortion under heavy loads, while the **integrated oil passages** provide efficient lubrication to critical components, reducing wear and extending engine life.

The **Street Strip Rotating** designation indicates that this block is optimized for aggressive driving conditions, featuring **reinforced main bearing caps** and **high-strength bolt patterns** to handle the stresses of high horsepower and torque. The **305-series casting** ensures compatibility with a wide range of aftermarket components, from forged pistons and connecting rods to performance camshafts and cylinder heads, allowing builders to fine-tune their engine for specific performance goals whether it s a high-revving street machine or a low-end torque monster. Additionally, the block s **smooth, polished surfaces** and **tight tolerances** facilitate easier assembly and improved sealing, reducing the risk of oil leaks and improving overall efficiency. Whether integrated into a **small-block Chevy powerhouse** for a classic muscle car or a **high-performance drag build**, this block delivers the strength and versatility needed to dominate the strip while maintaining reliability under extreme conditions.

### **Pros and Cons of buying a Eagle B15404L03053 Block (Chevy Street Strip Rotating 383 CI Rear)**

1. **High-Quality Cast Iron Construction** The Eagle B15404L03053 is a well-regarded aftermarket block known for its durability and strength. Cast iron blocks are less prone to warping compared to aluminum, making them ideal for high-performance applications.

2. **Proven Compatibility** This block is designed specifically for the Chevy Street Strip (SS) rotating 383 CI engine, meaning it is engineered to fit seamlessly with the stock or modified components of that engine family. It avoids common clearance issues found with generic blocks.

3. **Strength for Forced Induction** The block is reinforced for higher cylinder pressures, making it suitable for turbocharged or supercharged applications. This is particularly useful if you plan to modify the engine for increased power output.

4. **Aftermarket Support** Eagle is a reputable manufacturer with a strong reputation in the performance engine market. The block is backed by a warranty and has a track record of reliability, which can be reassuring for buyers.

5. **Rotating 383 CI Design** The "rotating" designation suggests that the block is optimized for a 383 cubic inch small-block Chevy engine with a rotating assembly (crankshaft, rods, pistons) that may include forged components. This can improve longevity under heavy loads.

6. **Widely Available Parts** Since this is a common Chevy small-block configuration, finding gaskets, head studs, and other necessary components is relatively easy. This reduces downtime and repair costs.

7. **Potential for Modifications** The block can accommodate aftermarket upgrades such as high-flow cylinder heads, performance camshafts, or even a stroker crankshaft if desired, making it a versatile choice for future modifications.

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1. **Cost** Aftermarket blocks like this one are more expensive than OEM replacements. The price tag may be a significant investment, especially if you're on a tight budget. Prices can range from $800 to $1,500 or more, depending on the seller and additional features.

2. **Installation Complexity** While the block itself is straightforward, installing it requires careful attention to gasket surfaces, torque specifications, and alignment. If you lack mechanical experience, you may need to pay for professional installation, adding to the cost.

3. **Weight** Cast iron blocks are heavier than aluminum alternatives. This can affect drivability, especially in high-performance applications where weight reduction is desirable (e.g., drag racing or track use).

4. **Potential for Warping** Although less common than with aluminum blocks, cast iron can still warp if not properly cooled or if the engine is subjected to extreme heat or poor cooling practices. Proper maintenance and cooling systems are essential.

5. **Limited Customization** Unlike some aftermarket blocks that offer bolt-on upgrades (e.g., integrated oil squirt holes), this block is a standard cast iron design. If you're looking for cutting-edge features, you may need to source additional parts separately.

6. **Resale Value** Aftermarket blocks, even high-quality ones, typically have lower resale value compared to OEM or fully restored engines. If you plan to sell the engine later, this could be a consideration.

7. **Potential for Clearance Issues** While the block is designed for the Chevy SS 383, some aftermarket components (e.g., aggressive camshafts, large valves, or high-flow heads) may still cause interference. Thorough research or consultation with a mechanic is advised before purchasing.

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The Eagle B15404L03053 block is an excellent choice for enthusiasts looking to build or replace a Chevy SS 383 CI engine, particularly if you plan to push the engine for performance or forced induction. Its strength, compatibility, and aftermarket support make it a reliable option. However, the higher cost, installation demands, and weight considerations should be carefully weighed against your budget and project goals.

If you prioritize durability, ease of parts sourcing, and the ability to handle modifications, this block is a strong recommendation. If you're working with limited funds or need a lighter-weight solution, you may want to explore alternatives like OEM blocks or aluminum options (though these come with their own trade-offs).

- You are building or replacing a Chevy SS 383 CI engine and need a high-quality, performance-oriented block.

- You plan to run forced induction or aggressive modifications.

- You value aftermarket support and compatibility with a wide range of parts.

- You are prepared for the upfront cost and potential installation challenges.

- You are on a tight budget and can find a high-quality OEM or used block at a lower cost.

- You prioritize weight reduction and are open to aluminum blocks (though these require careful cooling).

- You lack mechanical experience and are unsure about installation hire a professional to ensure proper setup.

For most serious Chevy enthusiasts aiming for a reliable, high-performance engine, the Eagle block is a solid and well-supported choice. Pair it with a matching set of components (e.g., forged internals, high-quality gaskets, and proper cooling) to maximize its potential.

Details:

American Express. Stroke: 3.750 in. Connecting Rod length : 5.700 in. 12cc Dished Pistons, Externally Balanced, Includes: Flex plate, Balance Eagle Small Block Chevy Street Strip Rotating Assembly 383 ci, 1 Piece Rear Main Seal, Assembly, Displacement: Bore: 4.030 in.

part #: b15404l03053 price

• $1258.99

specifications cranshafengin:

• for models: Street
• for makes: Chevy, Eagle
• brand: Eagle
• mpn: B15404l03053
• part type: Block Strip
• country of origin: Chn
• upc: 793348805610

returns cranshafengin:

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

offer cranshafengin:

• started: April 16, 2026
• availability: In Stock
• quantity: 9
• sold: 0
• options: Ship-to-home

seller cranshafengin:

• # reviews: 625562
• city: , Ohio
• rating: 99.4%

shipping cranshafengin:

• transit: 4-7 Days
• class: Standard
• service: Standard
• cost: $0.00
• type: Fixed

payments cranshafengin:

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

general cranshafengin:

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

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