SCAT CRANKSHAFTS CONNECTING RODS 2-ICR6135-1 Big Block Pro 846091052197 4340 Forged 6.135 Single

( Brand: Scat Crankshafts Connecting Rods ), ( Manufacturer Part Number: 2-ICR6135-1 ), ( Type: Connecting Rod ), ( Fitment Type: Performance/custom ), ( Material: Steel ), ( Country Of Origin: United States ), ( California Prop 65 Warning: Warning, Go To Www.p65warnings.ca.gov. ), ( UPC: 846091052197 )

Review SCAT CRANKSHAFTS CONNECTING RODS Big Block Chevy Pro Stock 4340 Forged 6.135 Inch Single fits 454

The **SCAT Crankshafts 2-ICR6135-1 Big Block Chevy 454 Pro 4340 Forged 6.135" Single Rod** is a meticulously engineered, high-performance component designed to elevate the power, durability, and reliability of your high-output Big Block Chevy 454 engine. Crafted from **AISI 4340 alloy steel**, this crankshaft is forged to exacting standards, ensuring superior grain flow and structural integrity under extreme stress, making it an ideal choice for serious builders pushing the limits of horsepower and torque. The **6.135-inch stroke** delivers a substantial boost in displacement, enhancing low-end torque and mid-range power while maintaining smooth operation across the rev range. This crankshaft features a **single main journal design**, which, while slightly less common than multi-main configurations, is optimized for high-revving applications where weight reduction and rigidity are critical. The **SCAT Pro series** designation underscores its advanced engineering, including precision-machined counterweights and balanced harmonics to minimize vibration and maximize durability, even under the most demanding conditions.

The **2-ICR6135-1** designation indicates a **two-piece connecting rod design**, combining the best of both worlds: the strength and rigidity of a forged rod with the precision and balance of a modern, high-performance rod set. The **forged 4340 steel construction** ensures exceptional fatigue resistance, making it capable of handling the immense forces generated by forced induction, nitrous, or extreme naturally aspirated setups. The **single rod configuration** is particularly well-suited for engines with a single-plane crankshaft, offering a compact design that reduces reciprocating mass and improves engine balance. This crankshaft is fully compatible with a wide range of Big Block Chevy engine builds, including those featuring **hydraulic or solid lifter camshafts**, and is designed to pair seamlessly with SCAT s other high-performance components, such as their forged pistons, rods, and bearings, to create a fully optimized power package.

For builders seeking **maximum power output without compromising longevity**, the SCAT 4340 forged crankshaft is an excellent choice. Its **heat-treated and stress-relieved** construction ensures it can withstand the rigors of high RPMs and extreme loads, making it a favorite among racers, drag enthusiasts, and street-street builds alike. Whether you're running a **supercharged, turbocharged, or nitrous-boosted 454**, this crankshaft provides the strength and precision needed to handle the increased stress while maintaining smooth operation. The **polished rod journals** and **precision-ground crankshaft** ensure easy installation and optimal bearing clearance, reducing friction and wear for longer component life. Backed by SCAT s reputation for innovation and reliability, this crankshaft is not just a replacement part it s a performance upgrade that will help you unlock the full potential of your Big Block Chevy engine.

### **Pros and Cons of Buying SCAT Crankshafts Connecting Rods (2-ICR6135-1 Big Block Chevy 454 Pro 4340 Forged 6.135 Single)**

1. **High-Strength Forged Construction** The 4340 steel is known for its excellent strength-to-weight ratio, making these rods and crankshaft ideal for high-performance applications. The forged process eliminates internal stresses and ensures consistent material properties.

2. **Proven Big Block Chevy Compatibility** SCAT s 2-ICR6135-1 design is specifically engineered for the **454 cubic inch big block Chevy**, ensuring proper fitment with stock and aftermarket components. The 6.135-inch stroke is a popular choice for high-RPM applications, offering a balance between torque and revving potential.

3. **Single-Row Design for Reliability** Unlike some aftermarket rods that use double-row designs (which can introduce flex and stress), SCAT s single-row configuration provides a more rigid, durable structure, reducing the risk of rod bending or failure under extreme loads.

4. **Precision Balancing & Machining** SCAT rods and cranks are dynamically balanced and precision-machined to tight tolerances, minimizing vibration and improving longevity. This is critical for forced-induction builds or high-RPM applications.

5. **Warranty & Reputation** SCAT is a well-respected brand in the performance market with a strong warranty (typically 1-2 years), offering peace of mind for serious builders. Their components are frequently used in professional racing and high-performance street applications.

6. **Versatility for Modifications** The 4340 steel can be heat-treated to different hardness levels, allowing for custom tuning to match specific engine builds (e.g., nitrous, turbo, or supercharged applications). The forged construction also accommodates custom grinding or balancing if needed.

7. **Stock-Style Fitment with Upgraded Strength** Unlike some aftermarket rods that require extensive modification, SCAT s design maintains many stock Chevy dimensions while delivering significantly higher strength, making them a practical upgrade for both stock and modified engines.

8. **Support for High-Performance Applications** The 6.135-inch stroke is a popular choice for engines aiming for **6,000 RPM**, making these components suitable for drag racing, street rod builds, or even mild turbocharged applications when paired with the right supporting parts.

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1. **Higher Upfront Cost** SCAT components are premium-priced compared to basic aftermarket or even some OEM replacements. For a complete rod and crankset, the cost can be **significantly higher** than budget-friendly alternatives, which may be a barrier for casual builders.

2. **Requires Supporting Upgrades** While SCAT s rods and crank are strong, they are not a "drop-in" solution for a stock engine. To fully utilize their potential, you ll need:

- A **high-quality main bearing set** (e.g., SCAT or Moroso)

- **Upgraded pistons** (forged, with proper compression ratio)

- **Strong cylinder heads** (e.g., Edelbrock, SCAT, or custom ported)

- **Reinforced block** (if running high power)

- **Proper lubrication system** (oil pump, filter, and high-quality oil)

Failure to address these will limit performance and may lead to premature failure.

3. **Installation Complexity** Forging and precision machining mean these parts require **experienced installation**. Improper assembly (e.g., incorrect rod end clearance, improper crankshaft alignment, or torque specs) can void warranties and reduce lifespan. Some builders may need to consult a machine shop or experienced mechanic.

4. **Weight Considerations** While 4340 steel is strong, it is heavier than some aluminum or titanium alternatives. This added weight can slightly reduce high-RPM performance unless the engine is otherwise optimized (e.g., lightweight valvetrain, high-revving camshafts).

5. **Limited Customization for Extreme Builds** While 4340 steel is versatile, extreme applications (e.g., **1,000 HP forced induction**) may require even more exotic materials (e.g., titanium rods, custom cranks) or additional reinforcement (e.g., cross-drilled rods, nitrided surfaces).

6. **Potential for Overkill on Mild Builds** If your engine is only running **stock or mild modifications** (e.g., carbureted, naturally aspirated, low compression), the cost of SCAT parts may not be justified. In such cases, a **budget rod and crankset** (e.g., ARP, Crane, or even some OEM replacements) could suffice.

7. **Availability and Lead Times** High-demand performance parts can sometimes have **longer lead times**, especially if ordering from a specialty supplier. This may delay engine assembly if you re on a tight schedule.

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SCAT s **4340 forged 6.135-inch crankshaft and connecting rods (2-ICR6135-1)** are among the best choices for a **high-performance Big Block Chevy 454** engine, particularly for builds targeting **6,000 RPM, forced induction, or serious power levels**. Their **superior strength, precision engineering, and reliability** make them a top-tier option for serious builders who want durability and performance.

However, they are **not a "set-and-forget" solution** they require a **complementary engine build** with upgraded supporting components to reach their full potential. The **high cost** and **installation complexity** mean they are best suited for **enthusiasts with experience or those willing to invest in a professional build**.

For **casual or mild-modification builds**, cheaper alternatives (e.g., ARP rods, Crane cranks, or even stock replacements with upgrades) may be more practical. But for **high-RPM, high-power applications**, SCAT is an excellent choice that justifies the investment.

- You re building a **high-performance Big Block Chevy 454** (e.g., drag racing, street rod with forced induction, or high-RPM naturally aspirated).

- You re willing to **invest in a complete engine upgrade** (pistons, heads, bearings, lubrication system).

- You have **experience with engine assembly** or are working with a **trusted machine shop**.

- You prioritize **durability, reliability, and long-term performance** over cost savings.

- Your build is **mildly modified** (e.g., carbureted, stock compression, low RPM).

- You re on a **tight budget** and can achieve similar results with **ARP rods, Crane cranks, or other high-quality aftermarket parts**.

- You lack **experience with high-performance engine assembly** and need simpler, more forgiving components.

For most **serious Chevy big block builders aiming for serious power**, SCAT is a **strong, well-supported choice** that delivers on its promise of strength and reliability. Just ensure the rest of the engine is up to the task.

Details:

B/E width - .992. Pro Series I-Beam Features Single rib cap design for added strength and bearing support. SCAT I-Beam Pro Stock Connecting Rods - Single, Part # 2-ICR6135-1, Application: Big Block Chevrolet, Specs: Rod length 6.135. Polished and shot preened beams to eliminate stress risers.

Rod Journal - 2.200. Wrist Pin - .990. Wrist Pin Style: Bushed / Floating. Striker Clearances.

part #: 2icr61351 prices

• $83.99-$549.00

specifications pistonrinro:

• for models: 454
• for makes: Chevy
• brand: Scat Crankshafts Connecting Rods
• mpn: 2-icr6135-1
• type: Connecting Rod
• fitment type: Performance/custom
• material: Steel
• country of origin: United States
• california prop 65 warning: Warning, Go To Www.p65warnings.ca.gov.
• upc: 846091052197

seller pistonrinro:

• rating: 100.0%
• city: Ontario, New York
• # reviews: 44395

offer pistonrinro:

• options: Ship-to-home
• quantity: 1
• sold: 0
• availability: In Stock
• started: March 5, 2026

payments pistonrinro:

• other
• wallet: Apple-pay
• credit card: Diners-club

general pistonrinro:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Connecting Rods Parts

shipping pistonrinro:

• carrier: FedEx
• service: FedEx 2Day
• class: Expedited
• cost: $0.00
• type: Fixed
• transit: 2-4 Days

returns pistonrinro:

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

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