SKU: NEVI-1052-NEO-12 | UPC: 1037721245428
Supertech Nissan RB25 DOHC NEO Inconel Exhaust Valves – Set of 12 (30.65mm +1mm Head)
The Supertech NEVI-1052-NEO-12 Inconel Exhaust Valves are the premium choice for high-performance Nissan RB25 DOHC NEO engine builds. These +1mm oversized (30.65mm head) Inconel valves offer superior heat resistance and strength, making them ideal for high-boost turbo applications, aggressive camshafts, and high-horsepower RB25DET setups. Sold as a complete set of 12, they provide exceptional durability under extreme temperatures and stresses while improving flow over stock valves.
Key Features
- Inconel Material: Extreme heat resistance and strength for turbocharged and high-RPM applications
- +1mm Oversized Head (30.65mm): Increased flow for better performance
- Precision Machined: 5.96mm stem and 97.65mm overall length for perfect fitment
- Full Set of 12: Complete exhaust valve set for RB25 inline-6 engines
- Supertech Quality: Trusted by professional engine builders for maximum reliability
Specifications
| Specification | Detail |
|---|---|
| Part Number | NEVI-1052-NEO-12 |
| Valve Type | Exhaust |
| Head Diameter | 30.65mm (+1mm Oversize) |
| Stem Diameter | 5.96mm |
| Overall Length | 97.65mm |
| Material | Inconel |
| Quantity | Set of 12 |
| Application | Nissan RB25 DOHC NEO Engines |
| Installation | Professional Cylinder Head Work Required |
| Country of Origin | United States |
| Warranty | Limited (Supertech) |
| Shipping Weight | Approx. 2-3 lbs |
What’s Included
- Set of 12 Supertech Inconel Exhaust Valves
- Technical Specifications
Product Notes
- Designed for high-boost turbo RB25 builds and aggressive performance applications
- +1mm oversized head improves airflow and performance
- Requires professional valve job and proper installation clearances
Installation Notes
- Requires precision cylinder head machining and valve job
- Professional machine shop installation strongly recommended
- Check valve-to-piston clearance and spring pressures
This Part Fits
| Engine | Notes |
|---|---|
| Nissan RB25 DOHC NEO | RB25DET NEO engines found in Skyline R33/R34, Stagea, and other performance models |
Why Choose Supertech Inconel Exhaust Valves?
- Superior heat resistance for high-boost and high-temperature applications
- Precision manufacturing for reliable high-RPM performance
- Proven in professional RB25 engine builds worldwide
Frequently Asked Questions
- Q: Are these intake or exhaust valves?
A: These are Inconel Exhaust Valves for the RB25 DOHC NEO engine. - Q: What does +1 mean?
A: +1mm oversized head diameter for improved flow compared to stock. - Q: Do I need a machine shop?
A: Yes – proper valve guide installation, seat cutting, and clearance checking is required.
Shipping & Handling
- Method: UPS / FedEx Ground
- Availability: In stock ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 2-3 lbs
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