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Vivid Racing Gear 
Howards Cams Extreme Billet Main Caps: Chevy 2-Bolt to 4-Bolt 400 Main Journal (H400)
If you're looking to upgrade your Chevy's performance, the Howards Cams Extreme Billet Main Caps are a game changer. Designed specifically for converting 2-bolt to 4-bolt configurations, these main caps are engineered for the Chevy 400 main journal, ensuring a perfect fit and superior strength.
Key Features
- Precision CNC Machined: Crafted from high-quality low carbon 1020 billet material, these caps are built to last.
- Versatile Options: Available as a stock replacement with straight bolt holes or with splayed outer bolt holes for enhanced stability.
- Splayed Caps: The splayed design features 10-degree angled outer holes that reinforce the block, providing added strength where it matters most.
- Complete Set: The main cap set includes the three center caps, with front and rear caps available separately for a complete upgrade.
- Easy Installation: Designed with side notches for hassle-free removal, and drill bushings are included where necessary.
- Made in the USA: Proudly manufactured in the United States, ensuring high quality and performance.
Benefits
These main caps significantly improve bottom-end stress and flex management, which is crucial for high-performance applications. The robust design helps maintain block integrity, allowing for higher RPMs and increased power output without the worry of cap failure.
Specifications
- Material: Low carbon 1020 billet steel
- Fitment: Chevy 2-bolt to 4-bolt 400 main journal
- Line Boring: Required after installation for optimal performance
Popular Fitments
- Chevrolet Camaro (1970-1981)
- Chevrolet Corvette (1970-1982)
- Chevrolet Chevelle (1970-1977)
- Chevrolet Silverado (1973-1987)
Customer Reviews
Customers rave about the Howards Cams Extreme Billet Main Caps, noting their exceptional quality and performance. Here’s what some users have to say:
- "These caps are a must-have for anyone looking to boost their engine's reliability. The fit is perfect!"
- "I installed these in my Chevelle, and the difference in stability is noticeable. Highly recommend!"
- "Great product! Easy to install and made a significant difference in my engine's performance."
Upgrade your Chevy with the Howards Cams Extreme Billet Main Caps and experience the difference in strength and performance. Your engine deserves the best!
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
Howards Cams is an aftermarket company that Howards Johansen founded in 1945. It started as Howards Power & Racing Equipment and specialized in manufacturing high-performance racing cams for the automotive market. Even after turning the business over their oldest son, the company remained one of the best cam manufacturers in the industry.
Maximizing Their Racing ExperienceThe company has always used it is on-track experience to create powerful cam profile designs. It is why they have become one of the favorite brands of many top fuel dragster racers and drivers from other racing disciplines such as road racing, mudd bogging, marine racing, and circle track racing.
Advanced Manufacturing TechniqueHowards Cams uses the most advanced computer design software to create the most competitive product out there. They offer a wide range of performance parts from camshafts, connecting rods, crankshafts, billet main caps, and forged pistons. All of these are made in the USA to ensure consistent quality.
Purchase Howards Cams Products At Vivid RacingIf you are in the market for high-performance parts for your engine, then look no further as Howard Cams is the brand for you. They have all the parts you need to create a fast machine and is trusted by many racers and enthusiast worldwide. If being on the top podium is your dream, then upgrade your engine with Howard Cams parts.
To know more about the company, visit Vivid Racing and check out their list of products that fit your specific needs.
| Sale price | None |
| Wholesale price | $251.33 |
| Shipping |
Weight: 7.60 Length: 13 Width: 4 Height: 3 |
| Product Added At | Wednesday 10 April, 2019 |
| Product Modified At | Friday 27 June, 2025 |
| Imported By | ETLOverride |
| Last Edited By | vendordata@vividracing.com |
| View In Admin |
| Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Howards Cams | $212.99 | $319.48 | $304.27 | ? | ? | 2025-06-27 06:05:00 |
