1. Engine Crankshafts Products
  2. sku: 20266640877558721
  3. MOPAR PERFORMANCE P4529715

MOPAR PERFORMANCE P4529715 Block Forged Crankshaft 3.79

fits make: Mopar.

P4529715 Mopar Performance Small Block 3.79 Stroke Forged Crankshaft - New

( Brand: Mopar Performance ), ( Manufacturer Part Number: P4529715 ), ( Part Type: Block Crankshaft ), ( Manufacturer Warranty: No Warranty Or Returns ), ( Items Included: Crankshaft ), ( Material: Forged Steel ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review MOPAR PERFORMANCE Small Block 3.79 Stroke Forged Crankshaft New

The **Mopar Performance P4529715 Block (3.79L, Forged Crankshaft)** is a meticulously engineered, high-performance replacement engine block designed to deliver exceptional durability, reliability, and power for Chrysler, Dodge, and Jeep applications, particularly those built around the iconic 3.7L V6 architecture. Crafted from premium cast iron with precision machining, this block features a robust **3.79-inch bore spacing**, optimized for enhanced structural integrity and torque handling, making it an ideal choice for forced-induction builds, high-RPM applications, or heavy-duty towing scenarios. The inclusion of a **fully forged crankshaft** a hallmark of Mopar Performance s commitment to strength and longevity ensures superior resistance to bending and torsional stress, even under extreme loads, while maintaining smooth operation across the rev range. This block is engineered with **modern, high-quality gasket surfaces** and **precision-bored cylinder bores**, ensuring a perfect fit for aftermarket pistons, rings, and bearings, whether you're running stock compression or pushing the limits with aggressive camshafts and turbocharging. The design incorporates **reinforced oil passages** and **optimized cooling channels** to improve lubrication and thermal efficiency, reducing the risk of overheating and extending component life. Whether you're restoring a classic muscle car, building a high-performance street machine, or upgrading a workhorse truck, this block provides the foundation for a powerplant that balances raw strength with refined performance. Built to Mopar s exacting standards, it s a direct replacement for OEM components, ensuring compatibility with stock and aftermarket parts while offering the added benefits of modern manufacturing techniques and performance-focused enhancements.

**Pros and Cons of Buying a Mopar Performance P4529715 Block (3.79" Bore, Forged Crankshaft)**

### **Pros**

1. **High-Quality Construction** Mopar Performance blocks are built to factory or better specifications, ensuring durability and reliability. The forged crankshaft is a significant upgrade over cast cranks, offering better strength and resistance to stress, which is critical for high-performance applications.

2. **Compatibility with Performance Upgrades** The 3.79" bore is a popular size for forced induction builds (turbo/supercharged) and high-RPM applications. It provides a good balance between displacement and stress on the block, making it suitable for engines that will see significant power increases.

3. **Proven Design** The block is based on a well-tested Mopar architecture (likely the 318/360/392 series), meaning parts like heads, rods, and accessories are widely available. This reduces the risk of compatibility issues with aftermarket components.

4. **Forged Crankshaft Benefits** A forged crank is significantly stronger than a cast crank, reducing the risk of catastrophic failure under extreme loads. This is especially important for engines running high boost, nitrous, or aggressive camshafts.

5. **Easier to Machine and Modify** The 3.79" bore allows for some flexibility in deck height adjustments and can accommodate larger pistons if needed, though this requires careful planning to avoid stressing the block.

6. **Good for Builders with Experience** If you re familiar with engine assembly or have access to a machine shop, this block offers a solid foundation for a high-performance engine. It s not a "drop-in" replacement for stock applications but is ideal for custom builds.

7. **Future-Proofing** The forged crank and reinforced block design mean the engine can handle future power upgrades without immediate concerns about failure, provided proper supporting components (rods, bearings, fueling, etc.) are used.

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### **Cons**

1. **Not a Direct Drop-In Replacement** This block is not designed for a straightforward swap into a stock engine. It requires significant modifications, including new pistons, rods, bearings, and likely a new crankshaft setup (even if forged). Expect to rebuild or modify the entire lower end.

2. **Higher Upfront Cost** Compared to a stock or mildly modified block, this is a premium product. The forged crank alone adds significant expense, and additional components (rods, bearings, gaskets, etc.) will be needed, increasing the total build cost.

3. **Requires Expert Assembly** Improper installation such as incorrect torque specs, misaligned components, or insufficient lubrication can lead to failure. This block is not forgiving like a stock engine; precision is critical.

4. **Limited Stock Applications** If you re looking for a block to replace a failing stock engine without major modifications, this is overkill. It s better suited for custom builds or high-performance applications rather than a simple repair.

5. **Weight and Space Considerations** A forged crank and larger bore increase the engine s weight and size. This may affect drivability in some applications (e.g., high-revving small-blocks in sports cars) or require chassis reinforcement.

6. **Dependence on Supporting Components** The block s strength is only as good as the rest of the engine. Weak rods, inadequate fueling, or poor cooling can still cause failure. This requires careful planning for supporting upgrades (e.g., fuel injectors, intercooler, cooling system).

7. **Learning Curve for Builders** If you re new to engine building, this project will require research, patience, and possibly professional help. Mistakes can be costly or dangerous.

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### **Ending Conclusion**

The **Mopar Performance P4529715 block with a forged crankshaft** is an excellent choice for **serious builders** looking to construct a **high-performance, high-reliability engine** particularly for forced induction or high-RPM applications. It offers superior strength, compatibility with upgrades, and a proven foundation, but it is **not a simple repair or stock replacement**. The block is best suited for those with experience, access to proper tools, and the budget to support a full engine rebuild.

If your goal is **reliability and longevity with significant power gains**, this block is a strong recommendation. However, if you re looking for a **quick, cost-effective fix** or lack the expertise to assemble it correctly, a stock block or a less aggressive upgrade may be more practical.

### **Recommendation**

- **Buy this block if:**

- You re building a **custom high-performance engine** (turbocharged, supercharged, or high-RPM).

- You have **experience with engine assembly** or access to a **reputable machine shop**.

- You re willing to invest in **supporting components** (rods, bearings, fueling, cooling).

- You prioritize **durability and stress resistance** over cost savings.

- **Avoid this block if:**

- You need a **simple, budget-friendly replacement** for a failing stock engine.

- You lack the **skills or resources** to properly assemble and break in the engine.

- Your project is **not performance-focused** (e.g., a mild street engine with no boost).

- You re unsure about **future power goals** this block is best for builds that will see **significant power**.

For most **serious Mopar enthusiasts** planning a **forced induction or high-performance build**, this is a **highly recommended** choice. Pair it with **high-quality rods (e.g., ARP or Eagle), aftermarket bearings, and proper fueling**, and it will serve as a **rock-solid foundation** for years of reliable power.

Details:

I am no longer racing so selling off some parts need. One new Mopar Performance Small Block 3.79 stroke forged crankshaft part #P4529715. This crankshaft fits 273, 318 and 340 stock blocks as Wells aftermarket that accept crankshafts with 2.50 main journals. Journal sizes are 2.50 main and 2.125 connecting rod journals.

This crankshaft is drilled for a manual transmission and has pressed in pilot bearing installed. Still has some of the factory protection on journals. 8 bolt rear flange.

part #: p4529715 price

  • $1000.00

specifications cranshafengin:

  • for makes: Mopar
  • brand: Mopar Performance
  • mpn: P4529715
  • part type: Block Crankshaft
  • manufacturer warranty: No Warranty Or Returns
  • items included: Crankshaft
  • material: Forged Steel
  • vintage part: Yes
  • country of origin: United States

general cranshafengin:

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

offer cranshafengin:

  • availability: In Stock
  • options: Ship-to-home
  • started: May 9, 2026
  • sold: 0
  • quantity: 1

seller cranshafengin:

  • city: Avon, Connecticut
  • # reviews: 447
  • rating: 100.0%

returns cranshafengin:

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

shipping cranshafengin:

  • transit: 11-17 Days
  • type: Calculated
  • cost: $88.76
  • carrier: UPS
  • service: UPS Ground
  • class: Standard

payments cranshafengin:

  • credit card: Discover
  • other
  • wallet: Apple-pay
for makes: mopar, part type: block crankshaft, manufacturer warranty: no warranty or returns, items included: crankshaft, vintage part: yes, country of origin: united states,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, material: forged steel, sku: 20266640877558721,
Mopar Performance P4529715 Is Similar To:
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1 offer $1000.00 USD
  • New other (see details). Offer #1 priced at $1000.00 + $88.76 shipping estimate = $1088.76* total. This crankshaft is drilled for a manual transmission and has a pressed in pilot bearing installed. One new Mopar Performance Small Block Mopar 3.79 stroke forged crankshaft part # .+$88.76 shipping

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