What material are these connecting rods made from?

These Manley Pro-Series connecting rods are forged from vacuum degassed 4340 steel alloy. This material is chosen for its excellent strength and durability under high stress, making it suitable for performance engine builds.

Are these rods suitable for racing applications?

Yes, the Pro-Series line is designed for high-performance use. Some specific SKUs within this range have earned NHRA Legal certification for Stock and Super Stock racing categories, indicating their robust construction and compliance with racing standards.

What is the significance of the 6.250 inch length?

The 6.250 inch length refers to the center-to-center distance of the connecting rod. This measurement is a critical dimension that affects piston compression height, rod ratio, and overall engine stroke, and must be matched to your specific crankshaft and piston combination for proper engine assembly.

Specifications

Brand: Manley Performance
Part #: 14157R6-8
UPC: 807298081168

Manley Chevrolet Small Block Pro-Series I-Beam Connecting Rod Set - 6.250in Length

Name: Manley Chevrolet Small Block Pro-Series I-Beam Connecting Rod Set - 6.250in Length
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-pro-series-i-beam-connecting-rod-t14-880078
Price: 2932.75 USD
Availability: BackOrder

$2932.75

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Manley Chevrolet Small Block Pro-Series I-Beam Connecting Rod Set - 6.250in Length. Forged 4340 steel for high-performance builds.

Key Features

Fits Chevrolet Small Block engines.
Rod length is 6.250 inches.
Constructed from vacuum degassed 4340 steel alloy for strength and durability.
I-beam design balances strength with weight savings.
Available in multiple weight options to suit different engine builds.
Some Pro-Series SKUs are NHRA Legal for Stock and Super Stock racing categories.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Forged from vacuum degassed 4340 steel alloy, these Manley Pro-Series I-Beam connecting rods are built for serious performance in Chevrolet small block engines. At 6.250 inches long, they are a critical component for anyone looking to build a high-revving, powerful engine that can handle significant stress. Manley has a solid reputation for making well-built internal engine components, and this set represents their commitment to precision and durability for demanding applications.

These rods are designed to be a strong link in your engine's rotating assembly. The I-beam design offers a good balance of strength and weight, and Manley offers various weight options within their Pro-Series line to match your specific build needs, whether you're aiming for a lighter rotating assembly or need extra mass for certain applications. Some models even carry NHRA Legal certification for Stock and Super Stock racing, which speaks to their robust design and adherence to strict standards. When you're rebuilding or upgrading your engine, choosing connecting rods that can reliably transfer power from the pistons to the crankshaft under high loads is paramount. These Manley rods are a popular choice for builders who want confidence in their engine's internals.

When installing these, ensure you follow the manufacturer's recommended clearances and torque specifications for both the big end and the wrist pin. Proper assembly is key to getting the most out of these well-made components and ensuring long-term reliability. If you're building a performance engine, investing in strong connecting rods like these is a fundamental step toward achieving your goals.