Manley Performance 3/8 inch ARP 2000 Material Connecting Rod Bolt (Part Number 42350-4) - 1.500 inch Under Head Length, Pack of 4

Important excerpt from the ARP catalog regarding proper fastener installation: “The importance of tightening fasteners to their required preload cannot be emphasized enough. If a fastener is not preload cannot be emphasized enough. If a fastener is not tightened properly, the fastener will not apply the required preload on the application it is being used for and may become susceptible to failure. Conversely, if a fastener is over tightened and stretched too much, it becomes susceptible to failure by exceeding it’s maximum yield point.” Underhead Length: 1.500 in. - Recommended Stretch (w/ ARP Lube): .0058-.0062 in. - Qty: 4 Manley Connecting Rod Bolt - Replacement Parts - Cap Screws 3/8" ARP 2000 - 1.500" UHL. For H-Beam Standard Weight, H-Lite Series and Pro Series I-Beam. Stretch .0058" to .0062" ARP2000 mat'l 55-65 w/oil 45-55 w/lube

• Premium ARP-manufactured rod bolts engineered for high clamp load and reliability
• Provides consistent preload when installed using recommended stretch method
• Precision thread rolling and heat treatment for maximum tensile strength
• Ideal for high-horsepower, high-RPM street and racing applications

The Manley Performance 42350-4 connecting rod bolts are engineered for high-performance automotive applications, offering durability and consistent preload essential for engine reliability. Manufactured from ARP 2000 material, these bolts are designed to withstand the stresses of high-horsepower and high-RPM environments, making them ideal for street and racing engines. The precision thread rolling and heat treatment processes ensure maximum tensile strength, which contributes to the overall integrity of your engine assembly. These bolts are specifically compatible with H-beam standard weight, H-Lite Series, and Pro Series I-beam connecting rods, providing a reliable solution for performance upgrades.

Proper installation is critical for optimal performance and safety. According to ARP guidelines, these bolts should be tightened to their recommended stretch, which ranges from .0058 to .0062 inches when using ARP lubricant. Achieving the correct preload is vital to prevent fastener failure—either from under-tightening, which risks insufficient clamping force, or over-tightening, which can stretch the bolt beyond its maximum yield point. These bolts are designed to be used with the recommended stretch method to ensure consistent preload and maximum reliability.

Each pack contains four bolts measuring 1.500 inches under head length, suitable for high-performance engine rebuilds and modifications. Whether you're building a race engine or upgrading your streetcar, the Manley Performance bolts provide the strength and precision needed for demanding applications. Backed by Manley's reputation for quality and engineered to meet the rigorous demands of high-power engines, these connecting rod bolts are a reliable choice for serious automotive enthusiasts and professionals alike.

Features:

• Manufactured from ARP 2000 material for high tensile strength and durability

• Designed for high clamp load with consistent preload when installed using recommended stretch method

• Precision thread rolling and heat treatment enhance strength and reliability

• Ideal for high-horsepower, high-RPM street and racing applications

• Compatible with H-beam standard weight, H-Lite Series, and Pro Series I-beam connecting rods

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1