If you're looking to beef up your engine's performance without breaking the bank, the Eagle Forged 4340 Crankshaft is a solid choice. I've had my hands on these cranks, and they really pack a punch when it comes to strength and reliability. Made from 4340 steel, they go through a rigorous forging process that ensures they can handle the heat—literally. We're talking about non-twist forging, multi-stage heat treatment, and a bunch of other processes like stress relieving and shot peening. This crank is built to last, even in the most demanding setups.
One of the standout features is how each journal is micropolished to a 3 R.A. or better. This kind of finish means less friction and better performance. Plus, with a .125" radius on all journals, you're getting a boost in strength, but keep in mind you'll need to use chamfered bearings to make it work. Designed for internal balance, this crank can handle up to 1500 horsepower, which is pretty impressive for a forged crank.
If you’re looking to shave off some weight, Eagle also offers a 'Lightweight' version. Those knife-edged counterweights can drop about 5-6 lbs, which is a nice touch if you’re aiming for quicker revs and better efficiency.
For those who might not need the full-on forged option, Eagle's cast steel crankshafts provide a reliable alternative to factory cranks. They’re designed with .092" radii, making them compatible with OE bearings and are recommended for setups up to 500 horsepower. Plus, they guarantee a target bobweight within +/- 2%, which is a nice peace of mind for anyone building an engine.
As for fitment, this crankshaft is a great match for a range of Chevrolet models, including:
Just a heads up: You’ll need to balance the crankshaft to match your specific rods and pistons. It's all about that perfect harmony in your engine.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1967-1992 Chevrolet Camaro |
Camaro | 1967-1992 |
|
1977-1993 Chevrolet Caprice |
Caprice | 1977-1993 |
|
1976-1987 Chevrolet El Camino |
El Camino | 1976-1987 |
|
1977-1985 Chevrolet Impala |
Impala | 1977-1985 |
|
1976-1983 Chevrolet Malibu |
Malibu | 1976-1983 |
|
1978-1988 Chevrolet Monte Carlo |
Monte Carlo | 1978-1988 |
|
1976-1979 Chevrolet Monza |
Monza | 1976-1979 |
|
1969-1974 Chevrolet Nova |
Nova | 1969-1974 |

EAGLE SPECIALTY PRODUCTS, aka EAGLE, has been at the forefront of developing top-quality engine components. The company officially started back in 1992 but has been developing their product for ten years prior. Since the company started, it has continuously produced some of the market's best engine components and is widely used by engine builders worldwide.
Imitated But Not DuplicatedDue to the company's success, its products have been imitated by other companies even up to the part numbers. But the similarity ends only up to how they look. EAGLE uses the finest materials and has invested in the most state-of-the-art manufacturing machinery for them to create a product that would be able to take any punishment it is subjected to. It is tested to be superior to other brands and considered the best upgrade for OEM counterparts.
No To ShortcutsThe company sets the benchmark on how valves should be properly made. Using their years of experience creating rods, they have already designed over 200 different rods and 180 crankshafts. The company does not allow cost to compromise its material used, manufacturing process, and quality test.
High-End QualityAll of Eagle's products are made up of high-quality materials. They use certified 4340 Chromoly steel. Using their own special heat treatment process, they are able to create a product that is much stronger compared to other competitors using the same raw material.
They manufacture their rods using a 2-piece forging process that allows the rod to be stronger. This process orients the "grain" of the metal to the direction of the stress. Eagle uses a state-of-the-art Sunnen Krossgrinding system that allows them to create perfect cuts and bore consistently.
Purchase EAGLE rods at Vivid RacingIf you want to upgrade your engine rods to something stronger and more reliable, then EAGLE is the brand for you. With their proven design and formula for creating rods, they have been sought after by top racing teams and engine builders. If they trust Eagle, so can you. Visit Vivid Racing and check out the list of parts specifically for your needs.