

Supertech single valve spring kit. Upgraded spring rate over factory for boosted SR20 builds running higher RPM.
Fits: Nissan SR20DET — S13, S14, S15 Silvia, 180SX
Part #: SPRK-H1021S-SR20
Confirm installed height and required seat pressure with your machinist or cam supplier before ordering. New, in original manufacturer packaging. Ships direct from our distribution partner.
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