Supertech Inner Valve Spring Kit - 1.8 BP Engine

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Inner Valve Springs Mazda Miata 1990-1997, 1999-2005, Ford Escort(1991-1996)

This kit allows you to upgrade your existing Supertech Single Spring kit to the Double Spring kit.  Convert your 56lbs seat pressure kit to the 63lbs seat pressure kit.  


After adding the inner spring you have a Light double spring that supports 8400rpm. 

Kit includes

  • 16 inner springs