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Dual valve spring kit

Dual valve spring kit
Dual valve spring kit
For the most extreme Miata engine builds - with titanium retainers. Ooooo.

Availability: In stock



For the most extreme Miata engine. If you're building a track car, 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 NA and NB Miatas. NA valves will require the use of valve keepers from a NB engine (not included).

  Head Diam Pressure (lbs@mm) Max lift Coil Bind Rate
  O.D. (mm) I.D. (mm) Seat Open (lift) mm mm lbs./mm
1994-05 27.50 15.20 74 @ 34.2 177 @ 10.5 11.50 20.70 12.1
Additional Information

Additional Information

Part number M04-66602
TÜV approval available No
Fits: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004 (non-MSM), 2005 (non-MSM), MSM
Manufacturer Supertech
Flyin' Miata exclusive No
Fits Exocet? No
Proposition 65 Warning: Cancer and reproductive harm
California emissions No information at this time
Instructions for this part are not currently available online.