-14%
Click to zoom in
SKU: 2149-12
GSC P-D Nissan RB26DETT 31.15mm Head +1mm OS 103.24mm Long +1.5mm Tip Exhaust Valve - Set of 12 1989-2002 Skyline GT-R
Upgrade your Nissan RB26DETT engine with GSC Power-Division exhaust valves designed specifically for Skyline GT-R models from 1989 to 2002. This set of 12 +1mm oversize valves features a 31.15mm head diameter and 103.24mm length with +1.5mm extended tip for enhanced sealing and exhaust flow in high-performance builds. Engineered for reliability under extreme boost and RPM these valves deliver consistent power gains in R32 R33 and R34 GT-R applications.
Key Features
- 31.15mm Head +1mm OS: Oversize head diameter increases exhaust flow area without compromising valve train geometry for better top-end power in turbocharged RB26DETT engines
- 103.24mm Length +1.5mm Tip: Extended tip improves valve seal and guides directly into stock or aftermarket seats reducing wear during high heat cycles
- One-Piece Forged 21-4N Stainless: High-strength stainless steel construction resists fatigue and maintains shape at elevated temperatures for race-level durability
- 7mm Stem Diameter: Precise stem sizing ensures compatibility with RB26DETT guides and springs while minimizing friction for smoother operation
- Swirl Polished Finish: Polished surfaces reduce airflow turbulence promoting efficient scavenging and higher horsepower output
Product Notes
- Valve seats and guides may require machining for +1mm oversize fitment
- Pair with GSC valve springs for optimal performance and spring pressures
- Ships in protective foam-lined box to prevent damage
Installation Notes
- Professional installation recommended.
- Machine valve seats to accommodate +1mm oversize head diameter
- Compatible with OEM or GSC valve springs and retainers no special hardware needed
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1989-1994 | Nissan | Skyline | R32 GT-R RB26DETT |
| 1995-1998 | Nissan | Skyline | R33 GT-R RB26DETT |
| 1999-2002 | Nissan | Skyline | R34 GT-R RB26DETT |
Why Choose GSC Power-Division?
- Trusted by GT-R tuners for JDM engine builds with proven track records
- USA-manufactured components using premium materials for long-term strength
- Precision CNC machining ensures exact tolerances for drop-in performance
Frequently Asked Questions
-
Q: Will these fit my stock RB26DETT head?
A: Yes with minor seat machining for the +1mm oversize head these install into factory or ported R32 R33 R34 GT-R cylinder heads -
Q: What material are the valves made from?
A: Forged one-piece 21-4N stainless steel provides excellent heat resistance and strength for boosted applications over 1000hp -
Q: Do I need new springs for installation?
A: Recommended to use GSC dual valve springs for proper coil bind and pressure but compatible with upgraded OEM-style springs
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Foam-lined box 12 x 6 x 2 inches
- Weight: 1.8 lbs
GSC Power Division
GSC Power Division camshafts and valvetrain parts for turbocharged import engines are stocked at Black Ops Auto Works. Shop camshafts, valve springs, retainers, valves, and head studs engineered for the Toyota 2JZ, Nissan RB26 and VR38DETT, Mitsubishi 4G63, Subaru EJ257 and FA20, and Honda K20 platforms. Every product is filterable by engine code, cam grind, and application so the correct part ships the first time. Black Ops Auto Works carries 407 GSC Power Division SKUs across camshaft, valvetrain, and engine internal categories. What This Brand Covers GSC Power Division is a specialist engine internals brand focused on camshafts, valve springs, retainers, and valves engineered specifically for high output turbocharged import engines. The catalog is built around specific engine codes rather than complete vehicles, which means the same part often applies across multiple chassis that share an engine platform. Brand Focus GSC Power Division designs valvetrain components for engine...
View GSC Power Division Products
Valves
Engine valves for import, domestic, and European performance builds are stocked at Black Ops Auto Works. Shop intake valves, exhaust valves, single-groove and triple-groove valves, Inconel and titanium valves, and complete valve sets for 2JZ, RB26, RB25, VR38DETT, K-series, EA888, EA113, FA20, S58, B58, and HEMI 5.4L and 5.7L applications. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 577 valve SKUs across intake, exhaust, and material specification categories. What This Category Covers The Valves category covers replacement and upgraded intake and exhaust valves for naturally aspirated, turbocharged, and supercharged cylinder heads. Coverage spans budget-focused OE-spec valves through race-grade Inconel and titanium valves built for sustained high RPM and boosted horsepower. Categories Included Intake valves, exhaust valves, single valves sold individually, and full valve set...
View Valves Products
Valves & Components
Valves and valvetrain components for import, domestic, and performance engine platforms are stocked at Black Ops Auto Works. Shop intake valves, exhaust valves, valve covers, valve cover gaskets, valve guides, valve springs, retainers, valve locks, valve seals, and lash caps for Toyota 2JZ and Supra, Honda K-Series, Nissan RB and SR20, BMW B58 and S58, Subaru FA20, Ford Coyote, and GM LS platforms. Every part is filterable by year, make, model, and engine so builders and tuners can confirm fitment before ordering. Black Ops Auto Works carries 1,391 valvetrain SKUs from proven performance brands. What This Category Covers Valves and valvetrain components manage airflow into and out of the combustion chamber and keep the valvetrain sealed and stable at high RPM. This collection spans intake valves, exhaust valves, valve covers, valve cover gaskets, valve guides, valve springs, retainers, valve locks, valve seals, lash caps, and cam follower shims. Why the Valvetrain Matters for Pe...
View Valves & Components Products