Description
Brian Crower Steel Valve Spring Seats – Honda K20A2 / K20Z3, F20C / F22C & C30A / C32B
Precision CNC-machined 4140 chromoly steel spring seats designed to protect aluminum cylinder heads and maintain precise valvetrain alignment in high-rpm Honda engines.
Product Overview
Engineered for high-performance motorsport applications, the Brian Crower BC2904 steel valve spring seats provide a rigid, wear-resistant base for upgraded dual valve spring assemblies. CNC-machined from hardened 4140 round bar chromoly steel to exacting tolerances, these seats prevent valve spring galling and protect the soft aluminum cylinder head surface under severe valvetrain load and high engine speeds.
Whether building a boosted K-Series engine, revving an S2000 F20C/F22C to 9,000+ RPM, or preparing an NSX C30A/C32B for circuit racing, the BC2904 spring seats ensure controlled spring rotation and consistent seat pressure across all cylinders.
Key Features
- ☑ Precision CNC machined from high-strength, hardened 4140 chromoly steel.
- ☑ Essential cylinder head protection against spring pocket deformation and metal fatigue.
- ☑ Engineered for smooth spring rotation during extreme high-RPM operation and coil travel.
- ☑ Direct fitment for Honda K20A2, K20Z3, F20C, F22C, C30A, and C32B cylinder heads.
- ☑ Designed for seamless integration with Brian Crower BC1040 and BC1040T dual valve spring packages.
Technical Specifications
| Brand | Brian Crower |
|---|---|
| MPN | BC2904 |
| Material | Hardened 4140 Chromoly Steel |
| Outer Diameter (O.D.) | 1.102″ |
| Step 1 Diameter | 0.844″ |
| Step 2 Diameter | 0.613″ |
| Unit Weight | 9.0g per seat |
| Engine Compatibility | Honda K20A2, K20Z3, F20C, F22C, C30A, C32B |
What’s Included in the Box
- • Full engine set of Brian Crower CNC 4140 Chromoly Steel Spring Seats (BC2904)
When pushing high-revving Honda valvetrains to their limit, rely on genuine Brian Crower components for proven performance. JP Racing maintains stock in the UK with fast shipping and full technical support for your race build.
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