Product Description
CNC Fabrication 421012 94.5-03 7.3L Stage 2 Bee Hive Valve Spring Kit With Valve Seals and Shims
The CNC Fabrication 421012 Stage 2 Bee Hive Valve Spring Kit is a high-performance valvetrain upgrade engineered for 1994.5-2003 Ford 7.3L Power Stroke engines. Designed for performance applications exceeding 500 horsepower, this complete kit includes bee hive valve springs, valve seals, spring shims, retainers, and keepers to provide superior valve control and stability under increased boost, RPM, and cylinder pressure.
Built specifically for the Ford Power Stroke platform, the CNC Fabrication Stage 2 kit offers increased seat pressure and open pressure compared to standard and Stage 1 valve springs. Whether you're upgrading injectors, turbochargers, camshaft components, or building a competition engine, this valve spring kit helps prevent valve float and improves valvetrain reliability in demanding operating conditions.
CNC Fabrication has spent years developing and supporting Ford Power Stroke performance products, delivering proven solutions designed to exceed the expectations of diesel enthusiasts, racers, and engine builders.
Features
- Designed for 1994.5-2003 Ford 7.3L Power Stroke engines
- Stage 2 bee hive valve spring upgrade
- Recommended for engines producing over 500 horsepower
- Improved valve control under high boost and RPM conditions
- Helps reduce the risk of valve float
- Includes new valve seals and spring shims
- Includes new spring retainers and valve keepers
- Supports valve lifts up to 0.600 inch
- Designed specifically for the Ford Power Stroke platform
- Ideal for towing, performance, street, and competition applications
Fitment
- 1994.5 Ford 7.3L Power Stroke
- 1995 Ford 7.3L Power Stroke
- 1996 Ford 7.3L Power Stroke
- 1997 Ford 7.3L Power Stroke
- 1999 Ford 7.3L Power Stroke
- 2000 Ford 7.3L Power Stroke
- 2001 Ford 7.3L Power Stroke
- 2002 Ford 7.3L Power Stroke
- 2003 Ford 7.3L Power Stroke
Note: Professional installation is recommended. Always verify installed height, valve lift, piston-to-valve clearance, and overall valvetrain geometry during assembly.
What's Included
- Stage 2 Bee Hive Valve Springs
- Valve Seals
- Valve Spring Shims
- Spring Retainers
- Valve Keepers
Specifications
- Manufacturer: CNC Fabrication
- Part Number: 421012
- Application: 7.3L Power Stroke Performance Valvetrain Upgrade
- Engine Compatibility: 1994.5-2003 Ford 7.3L Power Stroke
- Spring Type: Stage 2 Bee Hive Valve Springs
- Installed Height: 1.880 Inch
- Seat Load: 155 lbs @ 1.880 Inch
- Open Height: 1.280 Inch
- Open Load: 377 lbs
- Recommended Valve Lift: 0.600 Inch Maximum
- Spring Rate: 370 lbs/in
- Coil Bind Height: 1.210 Inch
- Includes Valve Seals: Yes
- Includes Spring Shims: Yes
- Includes Retainers: Yes
- Includes Keepers: Yes
- Recommended Power Level: 500+ Horsepower Applications
Cross Reference Numbers
421012, CNC421012, 7.3 Stage 2 Valve Springs, 7.3 Bee Hive Valve Spring Kit, Power Stroke Valve Spring Upgrade, 7.3 Performance Valve Springs
FAQ
What is the difference between the CNC Fabrication Stage 1 and Stage 2 valve springs?
The Stage 2 kit provides increased spring pressure and valve control compared to Stage 1 springs, making it a better choice for engines producing over 500 horsepower or operating under higher boost and RPM levels.
Do these springs help prevent valve float?
Yes. The increased seat pressure and open pressure help maintain valve control during high-performance operation, reducing the risk of valve float.
Are valve seals included with the kit?
Yes. The CNC Fabrication 421012 kit includes new valve seals, spring shims, retainers, and keepers for a complete installation.
What is the maximum recommended valve lift?
This valve spring kit is designed for applications with up to 0.600 inch valve lift.
Will these fit all 7.3L Power Stroke engines?
Yes. This kit is designed for all 1994.5-2003 Ford 7.3L Power Stroke engines.
Is this kit suitable for performance engine builds?
Absolutely. The CNC Fabrication Stage 2 Bee Hive Valve Spring Kit is designed specifically for high-performance and competition-oriented 7.3L Power Stroke builds where improved valvetrain stability is required.
