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Dual valve spring kit
Dual valve spring kit
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Regular price
$489.00 USD
Regular price
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$489.00 USD
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SKU
SKU
04-66602
What does it fit?
What does it fit?
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For the most extreme Miata engine. If you're building a track car and are planning on extended run time above 7500 rpm or boost 18 psi or more - they're what you need.
Aluminum spring seat, chrome silicon steel springs, and titanium retainer. Sold in sets of 16 for a complete head. Fits all BP (1.8L) engines in both NA and NB Miatas. NA valves will require the use of valve keepers from an NB engine (not included).
- Seat pressure: 85 lb @ 33.60 mm
- Open pressure: 205 lb @ 10 mm
- Max lift: 12.90 mm
- Coil bind: 20.70 mm

