MANDO PLUS AB190058 Manley Performance Gm Ls Forged Crank 807298000626 4340 4.000 58T R/w

( Brand: Mando Plus ), ( Manufacturer Part Number: AB190058 ), ( Part Type: Crank ), ( Performance Part: Yes ), ( UPC: 807298000626 )

Review MANDO PLUS Manley Performance Products Gm Ls 4340 Forged Crank 4.000 Stroke 58t R/w

The **Manley Performance GM LS 4340 Forged Crankshaft (Part # AB190058)** is a meticulously engineered, high-performance replacement designed to elevate the power, durability, and reliability of your LS-based engine. Crafted from **4340 alloy steel**, this crankshaft is forged to exacting standards, ensuring superior strength, fatigue resistance, and dimensional stability critical attributes for engines pushing beyond stock limits. With a **4.000-inch stroke**, this crank delivers a substantial boost in displacement, making it an ideal choice for builders targeting high horsepower applications, whether for street tuning, drag racing, or high-revving performance engines. The **58-turn main journal design** (measured in degrees) optimizes oil flow and reduces friction, enhancing lubrication efficiency and contributing to a smoother, more consistent operation under heavy loads. The crank features **ground and polished journals** for precision fitment, ensuring minimal clearance and optimal bearing performance, while the **balanced and dynamically tested** construction guarantees smooth operation across the entire RPM spectrum. Whether paired with a high-flowing cylinder head, aggressive camshaft, or forced induction, this crankshaft is built to handle the demands of modern high-performance engines without compromising on longevity. Perfect for applications ranging from mild street builds to extreme power scenarios, the Manley LS 4340 forged crank is a premium upgrade that combines strength, precision, and performance to help you unlock the full potential of your LS engine.

### **Pros and Cons of buying a Mando AB190058 Manley Performance GM LS 4340 Forged Crank (4.000" Stroke, 58T, Right-Hand Thread)**

#### **Pros**

1. **High-Quality Forged Crankshaft** The GM LS 4340 forged crank is known for its durability and strength, making it suitable for high-performance applications. Forged cranks resist fatigue better than cast cranks, reducing the risk of catastrophic failure under heavy loads.

2. **Increased Stroke (4.000")** A longer stroke (4.000") improves low-end torque and power delivery, which can be beneficial for drag racing, towing, or heavy-duty applications. This modification enhances linear power, making the engine feel more "pulling" at lower RPMs.

3. **58T Rods** The 58T (5.8-inch) rods are longer than stock, which helps maintain rod angle and reduce stress on the crankshaft bearings. This can improve reliability and power output, especially in high-RPM applications.

4. **Right-Hand Thread (R/W)** The right-hand thread is a common specification for performance builds, ensuring compatibility with aftermarket components and easier installation of accessories like harmonic balancers or flywheels.

5. **Manley Performance Reputation** Manley Performance is a well-respected brand in the aftermarket, known for high-quality forged components. Their cranks are often used in professional racing and high-performance street builds.

6. **Compatibility with LS-Based Engines** This crank is designed for GM LS-series engines (e.g., LS1, LS2, LS3, LS7), making it a straightforward upgrade for many performance builds. It can be paired with other Manley components for a full performance package.

7. **Potential for High Horsepower** When combined with a properly matched engine build (pistons, rods, camshaft, fueling, and cooling), this crank can support significant power gains, making it suitable for both street and track applications.

8. **Aftermarket Support** There is a wide availability of supporting components (e.g., Manley pistons, rods, bearings, and balancing services) to ensure a complete and optimized build.

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#### **Cons**

1. **Cost** Forged cranks are significantly more expensive than cast cranks. The Manley LS 4340 crank, along with the 58T rods, will likely cost several thousand dollars, making it a major investment. This may not be justified for mild street builds or budget-conscious projects.

2. **Requires a Full Engine Build** Simply swapping in this crank without upgrading other critical components (e.g., pistons, rods, bearings, camshaft, fueling, and cooling) can lead to premature failure. A forged crank thrives in a balanced, high-performance engine, so neglecting other parts can negate its benefits.

3. **Balancing and Tuning Required** Forged cranks often require professional balancing to ensure smooth operation, especially when paired with longer rods. Improper balancing can cause excessive vibration, leading to wear on the engine bay and drivetrain.

4. **Limited Stock Compatibility** The 4.000" stroke and 58T rods are not stock dimensions for most LS engines. This means you ll need to modify or replace other components (e.g., connecting rods, pistons, cylinder heads, and possibly the block) to accommodate the new specs. This adds complexity and cost to the build.

5. **Potential for Overkill** If your application doesn t require extreme power (e.g., a mild street car or a lightly modified truck), the benefits of a forged crank and longer stroke may not be worth the investment. A stock or mildly upgraded crank (e.g., 3.900" stroke) might suffice.

6. **Installation Complexity** Swapping a crank requires disassembling the engine, which can be time-consuming and labor-intensive. If you re not experienced with engine work, this project may require professional help, adding to the cost.

7. **Warranty and Return Risks** Aftermarket cranks are typically sold "as-is," meaning they may not come with a manufacturer warranty. If the crank fails prematurely due to a defect, returns or replacements may be difficult to obtain.

8. **Fuel and Cooling Demands** A longer stroke and higher power output will increase the engine s demand for fuel and cooling. Without proper upgrades (e.g., fuel injectors, intercoolers, radiator, and oil cooling), the engine may struggle to handle the additional stress, leading to overheating or detonation.

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### **Ending Conclusion**

The **Mando AB190058 Manley Performance GM LS 4340 forged crank (4.000" stroke, 58T, R/W)** is an excellent choice for **high-performance, high-RPM, or extreme-duty applications** where reliability, durability, and significant power gains are prioritized. It is particularly well-suited for **drag racing, high-horsepower street builds, or professional racing applications** where a forged crank s strength and torque characteristics are essential.

However, this crank is **not a simple drop-in upgrade** it requires a **comprehensive engine build** with matching components to avoid failure. The cost is high, and the benefits may be overkill for **mild street modifications or budget-conscious projects**. If your goals are modest (e.g., a 500 700 hp street engine), a stock or mildly upgraded crank (e.g., 3.900" stroke) paired with supporting components may be a more practical and cost-effective solution.

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### **Recommendation**

- You are building a **high-performance LS engine** (800 hp) for **racing, drag racing, or extreme towing**.

- You are committed to a **full engine rebuild** with matching forged pistons, rods, bearings, and supporting systems (fueling, cooling, camshaft).

- You have experience with engine work or are working with a trusted mechanic.

- Your budget can accommodate the **high upfront cost** and potential additional expenses for balancing, tuning, and supporting components.

- You are on a **tight budget** or building a **mildly modified street engine**.

- You lack experience with **engine disassembly, balancing, or high-performance tuning**.

- Your application does not require **extreme power or reliability** (e.g., a daily driver with modest modifications).

- You cannot commit to a **full engine support package** (e.g., fuel system upgrades, cooling modifications).

For most **street builds under 700 hp**, a **stock or mildly upgraded crank** (e.g., a forged LS crank with a 3.900" stroke) paired with a **balanced rod and piston set** may be a more practical choice. However, if you are targeting **high horsepower or racing applications**, the Manley forged crank is a **premium, high-performance option** worth considering with the right preparation.

Details:

Their product catalog includes valve train components, pistons, rings, connecting rods, and crank shafts. Manufacturer: Manley Performance Products. These products are available for everything from late model V8s to sport compacts.

part #: ab190058 prices

• $17.00-$333.21

specifications cranshafengin:

• brand: Mando Plus
• mpn: Ab190058
• part type: Crank
• performance part: Yes
• upc: 807298000626

seller cranshafengin:

• rating: 99.8%
• city: San Leandro, California
• # reviews: 120411

offer cranshafengin:

• started: February 4, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 4
• sold: 0

shipping cranshafengin:

• type: Fixed
• service: Standard
• class: Standard
• transit: 2-6 Days
• cost: $0.00

returns cranshafengin:

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

general cranshafengin:

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

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• wallet: Apple-pay