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Dual valve spring kit
Ships for free!
$489.00
ON BACKORDER, ETA Mar 19, 2021
Part number
M04-66602
For the most extreme Miata engine builds - with titanium retainers. Ooooo.
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 | |
| Part number | M04-66602 |
|---|---|
| Designed for model year: | 1997 |
| Fits Exocet? | No |
| California emissions | No information at this time |
| Manufacturer | Supertech |
| Proposition 65 | Warning: Cancer and reproductive harm |
| Flyin' Miata exclusive | No |
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