Skip to product information
1 of 2

Dual valve spring kit

Dual valve spring kit

No reviews yet
Regular price $489.00 USD
Regular price Sale price $489.00 USD
Sale Sold out



What does it fit?

Coming soon


Instructions are not currently available.

Emissions information

Not applicable

Shipping restrictions

There are no restrictions on this item.
View full details

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