When it comes to enhancing your Mitsubishi 4G63 engine, the Manley Forged H-Beam Connecting Rods (part number 14021-4) are a top choice for performance enthusiasts. Known for their strength and reliability, these connecting rods are designed specifically for the 6-bolt 4G63 models produced between 1990 and 1993, making them an ideal upgrade for your vehicle.
Manley Performance is renowned in the Sport Compact industry for producing some of the finest steel connecting rods. The H-Beam design of these rods not only provides a lightweight solution but also ensures remarkable durability. Crafted from 4340 alloy forgings, each rod undergoes a meticulous manufacturing process that includes:
Every set of Manley H-Beam connecting rods is equipped with 3/8" ARP 2000 bolts, ensuring a secure fit and reliable performance. If you opt for the H-Plus series, you'll benefit from even stronger ARP 625+ bolts. These rods are weight-matched to within ± 1.5 grams, and both the big and small end bores are final honed to a precision of ± .0002". This attention to detail guarantees that each rod meets the highest standards.
The Manley Forged H-Beam Connecting Rods are specifically engineered for the Mitsubishi 4G63 6-Bolt engines from 1990 to 1993. Whether you're building a street machine or a race-ready setup, these rods can handle up to 600 horsepower, making them a reliable choice as you push your engine's limits.
Customers rave about the quality and performance of the Manley Forged H-Beam Connecting Rods. Many have noted their exceptional strength and how they withstand the rigors of high-performance applications. Here are a few highlights from user reviews:
Upgrade your Mitsubishi 4G63 engine with the Manley Forged H-Beam Connecting Rods and experience the difference in quality and performance. Your engine deserves the best, and these rods deliver just that.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1990-1993 Mitsubishi Eclipse |
Eclipse | 1990-1993 |

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.