
Manley 3/8" Dia 1.600" Length Connecting Rod Bolts (Part No. 42321-1)
When it comes to high-performance engines, the right components make all the difference. The Manley 3/8" Diameter 1.600" Length Connecting Rod Bolts, specifically designed as part number 42321-1, are engineered to meet the demands of serious automotive enthusiasts and professionals alike. Whether you're upgrading your engine or replacing worn-out bolts, these connecting rod bolts bring reliability and strength to your build.
Key Features
- Diameter: 3/8" - Perfectly sized for a secure fit in your engine.
- Under Head Length: 1.600" - Ensures optimal engagement and performance.
- Material: Made from ARP 625+ - This high-strength material is known for its exceptional durability and resistance to fatigue.
- Sold Individually: Purchase only what you need for your specific application.
Benefits of Choosing Manley Connecting Rod Bolts
Manley Performance has a long-standing reputation in the aftermarket industry, particularly in the realms of sport compact, Ford modular, and Chevy LS markets. By choosing the Manley 42321-1 connecting rod bolts, you're not just getting a part; you're investing in quality and performance that has been tested and proven by countless enthusiasts and professionals.
Fitment Information
The Manley 42321-1 connecting rod bolts are designed to fit a variety of high-performance applications. They are particularly suited for engines that demand precision and reliability, making them an excellent choice for those working on performance builds or engine restorations.
Customer Feedback
Customers rave about the Manley 42321-1 connecting rod bolts, highlighting their strength and reliability. Many have noted how these bolts have held up under extreme conditions, making them a trusted choice for high-performance builds. Here are some reviews from satisfied users:
- "These bolts are fantastic! I've used them in my LS build, and they hold up perfectly even under high RPMs." - Verified Buyer
- "Manley never disappoints. The quality is top-notch, and they fit like a glove." - Performance Enthusiast
- "I replaced my old bolts with these, and I can feel the difference in my engine's performance. Highly recommended!" - Engine Builder
With the Manley 3/8" Dia 1.600" Length Connecting Rod Bolts (42321-1), you can be confident that you're using a product that stands up to the rigors of high-performance applications. Upgrade your engine with these reliable bolts and experience the quality that Manley Performance is known for.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Manley Performance, formerly called Manley Speed Equipment, was established in 1966 by Hank Manley shortly after his graduation from Brown University. His interest in the performance and racing traced back to 1960 when, at age 17, he rebuilt a 312 CID Ford V8 engine, installed a camshaft and three two-barrel carbs, and raced a ’56 Thunderbird on New Jersey’s streets. Initially, the company’s product lineup included stainless valves, lifters, camshafts, forged pistons, vanadium valve springs, pushrods, and timing chain kits. By 1998, Manley had outgrown its first Bloomfield, New Jersey facility and bought several acres in Lakewood, New Jersey. It was around this time that the brand’s name formally changed to Manley Performance. Nearly a decade later, the production space doubled in size.
Evolving in the Automotive SpaceLed by GM Michael Tokarchik in 2002, Manley entered the high-performance passenger car market as an OEM supplier of connecting rods for the 2003/2004 Ford SVT Mustang Cobra. Production reached 2500 rods per week without missing a single delivery date. Ford awarded Manley its highest ever supplier rating. Manley’s presence in the OEM market continued from there as a supplier for the Ford GT. After nearly 50 years since its inception, Manley continues to be globally recognized as the leading manufacturer of performance valves, connecting rods, cylinder head components, pushrods, drive and oil systems, and several other engine parts.
What is Manley’s Specialty?Manley Performance specializes in high-performance engine internals that range from stock replacements to full-on race applications. They have been the standard of the industry since their inception; a fact that still remains true now as they have ventured into new markets. Today, Manley Performance continues to re-define itself in a high-performance aftermarket industry that is constantly evolving. The brand has developed a wide range of new products for growing markets that include sport compact, Ford modular, and Chevy LS. Manley also maintains its leadership role with the traditional V8 engine business.
Get Manley Performance at Vivid RacingIf you are in need of a serious upgrade to your engine, then Manley Performance parts should be on your list. Like all of our suggested manufacturers, Manley uses the best materials available to ensure a quality part for your engine. We carry Manley connecting rods, crankshafts, pistons, and valve components. The large lineup of domestic parts includes sport compact vehicles, Ford modular engines, GM’s LS series internals, and HEMI product upgrades for Chrysler.
If you can’t find what you’re looking for or need help choosing the right part for your car, call our sales team at (480) 966-3040. We are here to make your buying experience a breeze.
Sale price | None |
Wholesale price | $52.82 |
Shipping |
Weight: 0.50 Length: 8 Width: 5 Height: 1 |
Product Added At | Thursday 04 August, 2022 |
Product Modified At | Wednesday 06 August, 2025 |
Imported By | ETLOverride |
Last Edited By | Turn_API |
View In Admin |
Carb Approved | Yes |
---|---|
Carb Number | - |
Epa Status | N/A |
Prop65 | Unknown |
Carb Required | - |
Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
---|---|---|---|---|---|---|---|---|---|---|
Turn 14 | $44.76 | $50.86 | ? | $48.31 | ? | 2025-08-06 10:32:40 |
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