Supertech Honda S2000 / f20 / k20 Series .Single Valve Spring kit: 80@40.4mm SPR-H1021S+RET-K20A2 / T2 ..
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Honda S2000 / F20 / K20-Series Dual Valve Spring Kit : 100@ 40.4mm SPR-H1020D+RET-K20A2 / T2+SEAT-H1020DS..
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