GSC Super Alloy Exhaust Valve Set – Standard Size – Nissan RB26DETT (Set of 12) – GSC2143-12
The GSC Power Division Super Alloy Exhaust Valve Set (PN GSC2143-12) is purpose-built for Nissan RB26DETT engines operating under extreme thermal and performance conditions. Designed to withstand exhaust gas temperatures up to 2000°F, these valves are ideal for high-horsepower turbocharged setups demanding durability and consistent flow.
- Head Diameter: 30.15mm / 1.187in
- Total Length: 101.74mm / 4.006in
- Stem Diameter: 6.905mm / 0.272in
Developed using advanced 3D design and simulation software, GSC’s Super Alloy exhaust valves feature a high-flow head profile tested specifically in RB26DETT applications. Reduced face distortion ensures better sealing under high heat and pressure, delivering reliable performance throughout the valve’s lifespan.
- Boosts engine breathing for enhanced power and efficiency
- Reduces valve weight to support higher RPM capability
- Minimize oil retention and reduce friction for smoother valve movement
- Built to endure extreme exhaust temperatures without compromising strength
- Hardened or fused with stelite wafer for extended wear resistance
- Compatibility: Works with OEM keeper/lock systems; new locks recommended for performance builds due to potential grooving
Backed by GSC Power Division’s reputation for precision, durability, and high-performance engineering.
Fitment:
- 1989 Nissan Skyline GT-R RB26DETT
- 1990 Nissan Skyline GT-R RB26DETT
- 1991 Nissan Skyline GT-R RB26DETT
- 1992 Nissan Skyline GT-R RB26DETT
- 1993 Nissan Skyline GT-R RB26DETT
- 1994 Nissan Skyline GT-R RB26DETT
- 1995 Nissan Skyline GT-R RB26DETT
- 1996 Nissan Skyline GT-R RB26DETT
- 1997 Nissan Skyline GT-R RB26DETT
- 1998 Nissan Skyline GT-R RB26DETT
- 1999 Nissan Skyline GT-R RB26DETT
- 2000 Nissan Skyline GT-R RB26DETT
- 2001 Nissan Skyline GT-R RB26DETT
- 2002 Nissan Skyline GT-R RB26DETT
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov

