If you're on the lookout for a high-performance crankshaft that delivers reliability and strength, the Manley Crankshaft CRANK-4340 Forge 4.100 Stroke is a fantastic choice. Designed specifically for domestic automotive applications, this crankshaft is engineered to meet the demands of serious performance enthusiasts.
This crankshaft is crafted from 4340 forged steel, known for its exceptional strength and durability. With a stroke length of 4.100 inches, it plays a crucial role in enhancing the engine's performance by optimizing the displacement and power output.
The Manley CRANK-4340 is designed to fit various performance applications, ensuring that it meets the needs of your specific vehicle. While it offers universal fitment, we recommend doing your research to confirm compatibility with your vehicle's engine. This crankshaft is particularly well-suited for high-performance builds, making it an excellent choice for those looking to boost their engine's capabilities.
Customers have praised the Manley Crankshaft CRANK-4340 for its solid construction and performance enhancements. Many users report noticeable improvements in engine responsiveness and power delivery, making it a popular choice among automotive enthusiasts. Here are some highlights from customer feedback:
Manley Performance has a reputation for producing top-notch performance parts that stand the test of time. With the CRANK-4340 Forge 4.100 Stroke, you’re not just getting a crankshaft; you’re investing in a component that will enhance your engine's performance and longevity.
Whether you're building a street machine or a race-ready engine, the Manley Crankshaft CRANK-4340 is a reliable choice that promises to deliver the performance you crave. Make sure to verify fitment for your specific application, and get ready to take your vehicle to the next level!
⚠ 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.