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SKU: KT4033
Ferrea Honda Type-R K20C1 Turbo Single Spring Kit
The Ferrea KT4033 Single Spring Kit is the best high-performance valve spring upgrade for Honda Civic Type-R K20C1 (1.5L Turbo) owners seeking reliable valve control at high RPM, boosted applications, or aggressive cam profiles. Engineered with premium single springs, tool steel retainers, seat locators, and valve locks, this complete kit delivers superior strength, consistent valve motion, and reduced valve float – ideal for street, track, or high-horsepower turbo builds on the K20C1 platform.
Key Features
- Premium Single Springs: High-tensile chrome silicon steel for maximum durability and consistent pressure at high RPM
- Tool Steel Retainers: High-strength retainers for reduced valvetrain mass and improved dynamics
- Seat Locators & Valve Locks: Precision components ensure proper alignment, seating, and retention
- Optimized Spring Rates: Engineered to handle aggressive cams and boost without coil bind or float
- Direct Fit: Designed specifically for K20C1 Type-R head – complete drop-in replacement
- Made in USA: Ferrea precision manufacturing – trusted in motorsport and high-performance Honda builds
Specifications
| Specification | Detail |
|---|---|
| Part Number | KT4033 |
| Spring Type | Single Spring |
| Retainer Material | Tool Steel |
| Engine | Honda K20C1 1.5L Turbo (Civic Type-R) |
| Compatibility | 2017+ Civic Type-R (FK8 / FL5) |
| Installation | Direct Drop-In (Requires Valve Spring Tool) |
| Country of Origin | United States |
| Warranty | Limited (Manufacturer) |
What's Included in the Kit (KT4033)
- 16 x Single Valve Springs (#S10165) — Made in the USA by PAC Racing Springs.
- 16 x Tool Steel Retainers (#E20056).
- 8 x Intake Seat Locators (#SL1151).
- 8 x Exhaust Seat Locators (#SL1152).
- 16 x Valve Locks (#K10116).
Product Notes
- Complete valvetrain kit – single springs with tool steel retainers, seat locators, and locks for high-RPM/boosted reliability
- Recommended for aftermarket cams, high-boost turbo setups, or stock valvetrain upgrades
- Does not include valve stem seals – reuse stock or upgrade separately for high-performance applications
Installation Notes
- Estimated time: 4-8 hours, advanced difficulty, professional installation strongly recommended
- Requires valve spring compressor tool, cam removal, and precise installation – torque to Honda specs
- Full valvetrain inspection, timing check, and break-in procedure advised during install
This Part Fits
| Year | Make | Model | Notes |
|---|---|---|---|
| 2017+ | Honda | Civic Type-R | FK8 / FL5 (K20C1 1.5L Turbo) |
Why Choose Ferrea K20C1 Single Spring Kit?
- Premium single springs and tool steel retainers provide excellent high-RPM stability and boost capability
- Complete kit reduces valvetrain mass and improves response in high-performance builds
- Made in USA with motorsport-proven quality – trusted upgrade for Type-R and K20C1 turbo applications
Frequently Asked Questions
-
Q: Will this kit fit my 2020 Civic Type-R?
A: Yes, Ferrea KT4033 is designed for all K20C1 engines in 2017+ Civic Type-R (FK8/FL5). -
Q: Does it include valve stem seals?
A: No – kit includes springs, retainers, seat locators, and locks; reuse stock seals or upgrade for high-boost. -
Q: Is professional installation required?
A: Yes – requires engine disassembly and precise valvetrain setup; professional recommended. -
Q: What RPM range is this kit good for?
A: Supports high-RPM builds (9000+ RPM) and aggressive cams in boosted K20C1 applications.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure retail box
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