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Rebuild Your CR-Z Head With Valves Built For Sustained Heat
The Supertech HEVI-1050-8 is a complete set of eight Inconel exhaust valves engineered for the Honda LEA1 and L15A1 1.5L SOHC engine found in the 2010-2015 Honda CR-Z. Machined from a nickel based superalloy, HEVI-1050-8 valves resist the thermal fatigue and creep that stock exhaust valves develop under repeated heat cycling, making this set a common choice for owners refreshing a high mileage head or building for track use.
Key Features
- Complete set of eight Inconel exhaust valves for one full engine rebuild
- Nickel based superalloy construction (Inconel 751 / Nimonic 80A) for high temperature strength
- Swirl polished valve heads to reduce turbulence and support consistent flow
- Precision ground stem with controlled finish for stable guide clearance
- Hardened valve tip rated beyond 52 HRc for long term wear resistance
- Single groove retainer design matches OEM style valve springs and retainers
- 23mm standard head diameter dish face matches factory port geometry
- HEVI-1050-8 direct fit replacement, no head modification required for stock builds
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 2010-2015 | Honda | CR-Z |
Specifications
| Detail | Value |
|---|---|
| MPN | HEVI-1050-8 |
| Valve Type | Exhaust |
| Quantity | 8 valves |
| Head Diameter | 23mm (standard) |
| Stem Diameter | 5.46mm |
| Overall Length | 117.55mm |
| Material | Inconel (751 / Nimonic 80A) |
| Face Type | Dish |
| Groove Type | Single groove |
| Engine Codes | LEA1, L15A1 |
| UPC | Not published by manufacturer for this set configuration |
What's Included
- 8x HEVI-1050-8 Inconel exhaust valves
- Manufacturer spec sheet
About Supertech
Supertech Performance designs and manufactures valvetrain components for import and domestic engine platforms, supplying engine builders and performance shops with valves, springs, retainers, and related hardware machined to tight tolerances for both daily driven and track focused engines.
FAQ
What is the HEVI-1050-8?The HEVI-1050-8 is a set of eight Inconel exhaust valves from Supertech built specifically for the Honda LEA1 and L15A1 1.5L engine used in the 2010-2015 Honda CR-Z. The nickel superalloy construction is designed to resist heat fatigue better than stock steel valves.
Will the HEVI-1050-8 fit a Honda Fit?The L15A engine family is shared across several Honda models, but this listing is verified for the CR-Z LEA1/L15A1 application. Confirm your specific engine code before ordering if installing in another chassis.
Do I need new valve springs and retainers with the HEVI-1050-8?Stock springs and retainers are compatible with the HEVI-1050-8 single groove design for most street builds, but a head builder should check installed height and seat pressure during installation regardless of valve brand.
What material are the HEVI-1050-8 valves made from?They are manufactured from Inconel 751/Nimonic 80A, a nickel based superalloy chosen for its ability to hold strength at the high temperatures exhaust valves are exposed to during normal engine operation.
Can the HEVI-1050-8 be used in a naturally aspirated CR-Z or only in modified builds?These valves are suitable for both stock power level rebuilds and modified builds. Many owners choose Inconel exhaust valves during a routine head rebuild simply for the added heat resistance over factory steel valves.
Does installing the HEVI-1050-8 require machine work on the head?No modification is required for a stock LEA1/L15A1 head. The 23mm standard head diameter and dish face match factory port geometry, so this is a direct fit replacement.
What is the stem diameter of the HEVI-1050-8?The stem diameter is 5.46mm, matching the factory LEA1/L15A1 valve guide specification.
How long is the HEVI-1050-8 exhaust valve?Each valve measures 117.55mm in overall length.
Install Instructions
- Remove the cylinder head and disassemble the valvetrain following factory service procedures
- Inspect and measure valve guides for wear before installing new valves
- Cut or verify valve seats to the correct angle and contact width for the new valve faces
- Install the HEVI-1050-8 valves and confirm smooth movement through the guides
- Reinstall springs, retainers, and seals, then set installed height and spring pressure
- Check for coil bind and retainer to seal clearance before reassembling the head
- Torque the head and valvetrain components to factory specification
- Run a leak down and compression check after break in
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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