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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)
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