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  See all Engine products
Eagle Specialty Products Pro Street Assembly Pontiac 400 - 615004155

If you’re diving into the world of naturally-aspirated racing, you’ll want to check out the Eagle Pro Street Rotating Assembly. This kit is built for performance, and you can really feel the difference when you’re on the track. With a 4.250” forged 4340 crank and 6.800” 4340 I-Beam rods, you know you’re getting some serious strength and reliability here. Those 7/16” ARP 8740 bolts? They’re not just there for show; they keep everything locked down tight, so you can push your engine to its limits without worrying about failure.

Now, let’s talk pistons. The forged 4032 Mahle -6CC flat-top pistons have a bore of 4.155”, which is perfect for maximizing your engine’s power while keeping it efficient. I’ve used these pistons myself, and I can tell you they hold up under pressure. Plus, the plasma-moly file fit rings ensure a solid seal, which is crucial for performance and longevity. And don’t forget about the King XP rod and main bearings—they’re a solid choice for anyone looking to keep their engine running smooth.

Just a heads-up, though: you’ll need to have this assembly balanced by a qualified machine shop before hitting the road or the track. It’s a crucial step that can’t be overlooked if you want everything to run like it should. Also, if you’re working with a 1976 Pontiac 400 block, this setup won’t fit due to those factory notches at the top of the cylinders, so keep that in mind.

Overall, this Pro Street assembly is a solid investment for anyone serious about their racing game. Just make sure to do your homework on fitment for your specific vehicle. It’s a universal fit, but a little research never hurts. Trust me, you’ll be glad you did.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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Who is EAGLE?

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 Duplicated

Due 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 Shortcuts

The 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 Quality

All 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 Racing

If 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.

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