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SKU: NEVI-1032-7-L-12 | UPC: 1037721244654
Supertech Nissan RB26 31.15mm +1.5mm Tip Inconel Exhaust Valve – Set of 12 (Req RET-NRB60-TS-2)
The Supertech NEVI-1032-7-L-12 Inconel Exhaust Valves are a top-tier racing upgrade for Nissan RB26DETT engines (R32/R33/R34 Skyline GT-R). Oversized +1.5mm tip (31.15mm head diameter), 6.94mm stem, and 102.7mm overall length, these valves are made from high-temperature Inconel alloy for extreme heat resistance and durability in high-boost, high-RPM turbo applications. The sodium-filled stem reduces weight and improves heat transfer, while the swirl-polished tulip head enhances exhaust flow and combustion efficiency. Sold as a set of 12 (full exhaust side), these valves require Supertech RET-NRB60-TS-2 retainers for proper single-groove lock compatibility. Ideal for street, drift, drag, or time-attack RB26 builds pushing 800+ horsepower with upgraded cams, springs, and boost levels.
Key Features & Benefits
- Inconel Alloy Construction – Exceptional heat resistance for high-boost and extreme RPM turbo applications
- +1.5mm Oversized Head (31.15mm) – Increases exhaust flow for higher horsepower and better top-end power
- Sodium-Filled Stem – Reduces valve weight and improves heat dissipation for cooler operation
- Swirl-Polished Tulip Head – Optimized flow characteristics and reduced turbulence for improved combustion
- Supertech Motorsport Quality – Precision-machined in Europe for reliability in professional racing
Specifications
| Specification | Detail |
|---|---|
| Part Number | NEVI-1032-7-L-12 |
| Brand | Supertech |
| Application | Nissan RB26DETT (R32/R33/R34 GT-R) |
| Valve Type | Inconel Exhaust |
| Head Diameter | 31.15mm (+1.5mm over stock) |
| Stem Diameter | 6.94mm |
| Overall Length | 102.7mm |
| Material | Inconel high-temperature alloy (sodium-filled stem) |
| Head Design | Swirl-polished tulip |
| Quantity | Set of 12 (full exhaust side) |
| Required Retainer | RET-NRB60-TS-2 (single groove) |
Whats Included
- Set of 12 Inconel exhaust valves – 31.15mm head, 6.94mm stem, 102.7mm length
Product Notes
- Designed for high-boost RB26 turbo builds – excellent heat resistance and flow
- Requires Supertech RET-NRB60-TS-2 retainers for single-groove compatibility
- Sodium-filled stem lowers operating temperature and reduces weight
- Compatible with high-lift cams, upgraded springs, and titanium retainers
- Supertech – European precision for professional motorsports and high-horsepower applications
Installation Notes
- Estimated time: 8-16 hours (full cylinder head work required)
- Requires head removal, valve job, seat cutting, and professional assembly
- Install with matching single-groove retainers, keepers, and upgraded springs
- Check valve-to-piston clearance, especially with +1.5mm oversized valves
- Professional engine builder installation strongly recommended
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 1989-1994 | Nissan | Skyline GT-R (R32) | RB26DETT 2.6L Twin-Turbo | Exhaust valves – high-boost/race upgrade |
| 1995-1998 | Nissan | Skyline GT-R (R33) | RB26DETT 2.6L Twin-Turbo | Exhaust valves – high-boost/race upgrade |
| 1999-2002 | Nissan | Skyline GT-R (R34) | RB26DETT 2.6L Twin-Turbo | Exhaust valves – high-boost/race upgrade |
| Various | Nissan | RB26DETT-Powered Vehicles | RB26DETT 2.6L | Custom turbo/racing builds |
Why Choose Supertech Inconel Exhaust Valves for RB26?
- Inconel alloy withstands extreme heat and boost in high-horsepower RB26 builds
- +1.5mm oversize and swirl-polished head for maximum exhaust flow and power
- Sodium-filled stem reduces heat and weight for better high-RPM stability
- Supertech European precision trusted in professional drifting, drag, and time attack
Frequently Asked Questions
-
Q: Will these fit my R34 GT-R RB26DETT?
A: Yes, direct fit for RB26DETT exhaust valves; +1.5mm oversize for increased flow. -
Q: Are these suitable for 1000+ hp builds?
A: Yes, Inconel construction and sodium-filled stem are ideal for high-boost, high-heat applications. -
Q: Do I need matching retainers?
A: Yes, requires Supertech RET-NRB60-TS-2 single-groove retainers.
Shipping and Handling
- Method: UPS / FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 2-3 lbs (set of 12 valves)
Supertech
Located in San Jose, California, in the heart of Silicon Valley, Supertech was born from the same fertile ground as many other innovative companies. We utilize cutting-edge technology to fuel our growth and deliver the highest performance valves and valve train components available. Why Choose Supertech? Over 30 Years of Experience: Our legacy in the industry ensures top-quality products. Superior Performance: We provide valves and valve train components specifically designed for the racing market. Versatile Applications: Ideal for various types of racing, including: Drag Racing Rally Road Racing And more! Custom Solutions: If you can't find the perfect fit, we are always willing to work with you to custom manufacture the ideal solution for your specific needs. CUTTING EDGE TECHNOLOGY Trusted by the best in the industry, Supertech is committed to leveraging the latest advancements in technology to enhance performance and reliability. Experience the difference with our prod...
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