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Shop / Engine

Dual valve spring kit

Name: Flyin' Miata
Price: 398.30 USD
Availability: InStock

$ 569.00 $398.30

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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