Performance Springs Toyota 1UZ V8 Valve Spring & Ti-Retainer Kit
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Valve Spring & Titanium Retainer Kit for Toyota 1UZ-FE Engines (6 mm Stem)
This spring and titanium retainer package is designed for early 1UZ cylinder heads using 6 mm valve stems. The spring rate supports increased lift and RPM levels while maintaining precise valve control.
Spring Characteristics
- O.D.: 1.010"
- I.D.: 0.735"
- Installed: 73 lbs at 1.310"
- Open: 140–145 lbs at 0.930"
- Coil Bind: 0.855"
Not compatible with later 5.5 mm stem 1UZ variants. Titanium retainers reduce mass and aid high-RPM valvetrain stability.
| Product Name | Performance Springs Toyota 1UZ V8 Valve Spring & Ti-Retainer Kit |
|---|---|
| Brands | Performance Springs |
| Engine | 1UZ-FE |
| Make | Toyota |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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Disclaimer:
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the maximum spring pressure for the Toyota 1UZ V8 Valve Spring & Ti-Retainer Kit?
The spring pressure at 0.930 inches is between 140-145 lbs, which is suitable for high-performance applications. Ensure your engine's camshaft profile is compatible with this pressure to avoid potential valve float.
What valve stem diameter do these titanium retainers accommodate?
These titanium retainers are designed specifically for 6mm valve stems. They are not compatible with the later 5.5mm valve stems, so verify your valve specifications before purchase.
What is the coil bind height for this valve spring kit?
The coil bind height for the Toyota 1UZ V8 Valve Spring & Ti-Retainer Kit is 0.855 inches. Ensure that your engine's setup allows for this height to prevent coil bind during operation.
Can I use these valve springs with stock camshafts?
While these valve springs can be used with stock camshafts, they are optimised for high-performance applications. If you're planning to increase lift or RPM, ensure your camshaft is compatible with the increased spring pressure.
What is the outer diameter of the valve springs in this kit?
The outer diameter of the valve springs in the Toyota 1UZ V8 Valve Spring & Ti-Retainer Kit is 1.010 inches. This dimension is crucial for ensuring proper fitment within the cylinder head.
