1. Engine Crankshafts Products
  2. sku: 20198906965453881
  3. DODGE 2658278

DODGE 2658278 Forged Steel Crankshaft .010/.010

fits model: 340, 318. make: Chrysler, Mopar, Dodge.

2658278 Dodge 340 Chrysler Mopar Forged Steel Crankshaft .010/.010 318

( Brand: Dodge ), ( Manufacturer Part Number: 2658278 ), ( Part Type: Crankshaft ), ( Material: Steel ), ( Vintage Part: Yes )

Review DODGE Chrysler Mopar Forged Steel Crankshaft .010/.010 fits 340 318

The **Dodge 2658278 340 Chrysler Mopar Forged Steel Crankshaft (010/.010 318)** is a high-performance, precision-engineered component designed to deliver exceptional durability, reliability, and power for high-output applications in muscle cars, street rods, and performance builds. Crafted from **full-forged 4340 alloy steel**, this crankshaft is built to withstand extreme stress, high RPMs, and aggressive engine modifications without compromising structural integrity. The **010/.010 journal configuration** featuring 0.750-inch main journals and 0.625-inch rod journals strikes an ideal balance between strength and weight, making it well-suited for engines with moderate to high displacement, such as the legendary **318 cubic-inch small-block Chrysler** found in classic Dodge and Plymouth models. The **7-bearing design** ensures smooth operation and optimal oil flow, reducing friction and minimizing wear, while the **precision-machined counterweights** help maintain perfect balance, reducing vibration and enhancing longevity.

This crankshaft is engineered to support **high-performance applications**, including forced induction (turbocharged or supercharged) setups, nitrous oxide enhancements, and aggressive camshaft selections, making it a versatile choice for both street and track use. The **Mopar brand** guarantees quality craftsmanship, with each crankshaft undergoing rigorous inspection to meet or exceed factory specifications, ensuring a seamless fit with stock or aftermarket components. Whether you're restoring a classic **Dodge 340** or building a modern high-performance engine, this crankshaft provides the **strength, precision, and reliability** needed to handle the demands of modern tuning. Its **forged construction** eliminates the risk of fatigue failure, while the **smooth finish and precise tolerances** ensure optimal performance across a wide range of engine modifications. Upgrade your engine with this **Mopar forged steel crankshaft** and experience the confidence of knowing your powerplant is built to last.

### **Pros and Cons of buying a Dodge 2658278 340 Chrysler Mopar Forged Steel Crankshaft (010/.010, 318)**

#### **Pros:**

1. **High-Quality Material** The forged steel construction ensures durability and resistance to stress, making it suitable for high-performance applications. Forged cranks are less prone to cracking or warping compared to cast counterparts.

2. **Balanced Fitment** The 010/.010 rod journal spacing is compatible with a wide range of Chrysler V8 engines, including the 340, 360, and 440 series, as well as aftermarket builds. This makes it a versatile choice for restorations or modifications.

3. **Proven Performance** Mopar (Chrysler s original equipment) parts are designed to meet factory specifications, ensuring reliability in stock and modified applications. Forged cranks are often preferred in forced-induction builds due to their strength.

4. **Compatibility with Aftermarket Upgrades** Since this crank is designed for a 318-inch displacement (though it can be used in larger engines with proper rod length adjustments), it pairs well with stroker kits, big-block swaps, or high-performance camshafts.

5. **Warranty and Support** Mopar parts typically come with manufacturer-backed warranties, providing peace of mind against defects. Chrysler/Mopar dealerships and specialty shops can offer installation support.

6. **Better Weight Distribution** Forged cranks are often lighter than cast equivalents, which can improve engine balance and reduce reciprocating mass, aiding in high-RPM performance.

7. **Long-Term Reliability** Forged steel cranks are less likely to fail under extreme stress, making them ideal for daily drivers, muscle cars, or classic restorations where longevity is critical.

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#### **Cons:**

1. **Cost** Forged steel cranks are significantly more expensive than cast alternatives. The price reflects the superior material and machining process, which may be a barrier for budget-conscious buyers.

2. **Specialized Installation** Some builds may require rod length adjustments or main cap modifications to ensure proper fitment, especially when using it in non-native engine configurations (e.g., a 340 crank in a 426 Hemi block). This may necessitate additional machining or custom parts.

3. **Limited Availability** While Mopar parts are widely available, specific forged cranks (especially older or discontinued models) may require ordering from specialty suppliers, which could extend lead times.

4. **Potential Overkill for Stock Applications** If the engine is not heavily modified (e.g., no forced induction, mild camshafts, or stock compression), a forged crank may be unnecessary, making a cast crank a more cost-effective choice.

5. **Maintenance Considerations** Forged cranks require proper lubrication and maintenance to prevent wear on rod bearings or main journals. Neglecting oil changes or using low-quality oil can compromise performance.

6. **Weight vs. Power Tradeoff** While forged cranks are lighter than cast, some aftermarket forged cranks (especially those with aggressive machining) may sacrifice some strength for weight savings. Always verify the crank s specifications to ensure it meets your power goals.

7. **Compatibility with Non-Standard Engines** If the engine is heavily modified (e.g., stroker rods, custom blocks), the crank may need additional machining or balancing, adding to costs.

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### **Conclusion:**

The **Dodge 2658278 340 Mopar forged steel crankshaft (010/.010, 318)** is an excellent choice for **high-performance, modified, or restored Chrysler V8 engines**, particularly those running forced induction, big cams, or stroker kits. Its forged construction ensures reliability under stress, and its versatility makes it suitable for a range of builds. However, the **higher cost and potential need for additional machining** may not justify its purchase for stock or lightly modified engines.

If your project involves **serious power goals, forced induction, or a classic restoration where durability is critical**, this crank is a strong recommendation. For **stock or mildly modified engines**, a cast crank may suffice and save money without sacrificing performance.

### **Recommendation:**

- **Buy it if:** You re building a **high-performance, stroker, or forced-induction engine** in a Chrysler V8 (340, 360, 440, etc.), or restoring a classic muscle car where longevity is a priority.

- **Skip it if:** Your engine is **stock or mildly modified**, and you re on a tight budget opt for a cast crank instead.

- **Consider alternatives if:** You need a crank for a **non-standard displacement** (e.g., 426 Hemi) or require **custom machining**, as compatibility may vary.

For the best results, consult with a **reputable engine builder or Mopar specialist** to ensure proper fitment and installation.

Details:

Used factory forged crankshaft for Dodge 340 with casting numbers 2658278, Main journals measure 2.490 .010, and rod are 2.115 please look at all pics condition.

part #: 2658278 prices

  • $350.00-$600.00

specifications cranshafengin:

  • for models: 340, 318
  • for makes: Chrysler, Mopar, Dodge
  • brand: Dodge
  • mpn: 2658278
  • part type: Crankshaft
  • material: Steel
  • vintage part: Yes

seller cranshafengin:

  • rating: 100.0%
  • # reviews: 2668
  • city: Houma, Louisiana

offer cranshafengin:

  • started: May 6, 2026
  • quantity: 1
  • availability: In Stock
  • sold: 0
  • best offers: True
  • options: Ship-to-home

general cranshafengin:

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

shipping cranshafengin:

  • type: Calculated
  • service: UPS Ground Saver
  • cost: $78.42
  • class: Economy
  • transit: 7-13 Days
  • carrier: UPS

payments cranshafengin:

  • wallet: Paypal
  • credit card: Visa
  • other

returns cranshafengin:

  • policy: Returns Accepted
  • time: 14 Days
  • paid by: Buyer
for models: 340, 318, for makes: chrysler, mopar, dodge, part type: crankshaft, vintage part: yes,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, material: steel, sku: 20198906965453881,
Dodge 2658278 Is Similar To:
cranshafengin logo
2 offers $350.00–$600.00 USD
  • Used. Offer #1 priced at $350.00 + $78.42 shipping estimate = $428.42* total. +$78.42 shipping
  • Remanufactured. Offer #2 priced at $600.00 + $167.45 shipping estimate = $767.45* total. Process Includes. 1962-79 318 Chrysler, Dodge.+$167.45 shipping

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