GSC Exhaust Valve Guide – Honda K20C1 CTR – Standard – Single – GSC3121
Precision-fit guide for high-performance K-series exhaust flow
This standard-size exhaust valve guide from GSC Power Division is engineered for Honda K20C1 CTR engines, offering reliable valve control and durability under high-temp conditions. Sold individually for targeted replacements. Also available in oversize variants (+0.001" and +0.003") for custom head work.
Specs – GSC3121 Standard Dimensions:
- Length: 1.970 in / 50.04 mm
- Outer Diameter: 0.4357 in / 11.07 mm
- Valve Stem Diameter: 5.5mm
Compatible with Honda Civic Type R models using the K20C1 engine. Ideal for rebuilds, upgrades, or precision tuning of exhaust valve components.
Fitment:
- 2015 Honda Civic Type R (FK2)
- 2016 Honda Civic Type R (FK2)
- 2017 Honda Civic Type R (FK8)
- 2018 Honda Civic Type R (FK8)
- 2019 Honda Civic Type R (FK8)
- 2020 Honda Civic Type R (FK8)
- 2021 Honda Civic Type R (FK8)
- 2023 Honda Civic Type R (FL5)
- 2024 Honda Civic Type R (FL5)
- 2025 Honda Civic Type R (FL5)
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
