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Supertech Miata Valve Spring Kit 94-05 BP 1.8


Product Description

Supertech 1.8 Valve Spring Kit with Titanium Retainers

94-05  Miata  1.8    91-96 Ford Escort GT 1.8   323, 323GT 323GTX 323GTR Familia

The below are estimates only and will vary greatly depending on valve weight, cam lift, and other variables.

Single spring – seat pressure 56lbs @ 34.2mm
Sustained revs to 7400rpm, mechanical over rev to 7800. N/A only

Light double spring – seat pressure 63lbs @ 34.2mm
Sustained revs to 7800rpm, mechanical over rev to 8200. < 8psi boost

Heavy double spring – seat pressure 74lbs @ 34.2mm
Sustained revs to 8500pm, mechanical over rev to 9000. > 8psi boost

Kit includes

  • 16 or 32 springs
  • 16 Titanium retainers RET-TS60/MA2
  • 16 spring seats, steel SEAT-TS/MA18I

If installing in a BP05 head 94-97 Miata, you’ll also need 32 OEM 99-05 retainers, Mazda # FS01-12-114