Ready to make all the power!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Ready to make all the power!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Upgrade your S55 Engine with this all Inclusive Kit from 5150!
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Upgrade your S55 Engine with this all Inclusive 1000hp Capable Kit from 5150!
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Includes all the valve stems needed for repairing, replacing, or upgrading your BMW's valves and stem seals!
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Upgrade Your Factory Intake and Exhaust Valves
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Two required per valve, necessary for use with certain supertech valves
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This product was last offered at the strikethrough price on
03-04-2026
Performance valve springs for S54 engines.
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MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
06-03-2026
The perfect seal for repairing, replacing, or upgrading your valves and stem seals!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Valve spring replacement kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This product was last offered at the strikethrough price on
05-02-2026
The perfect seal for repairing, replacing, or upgrading your valves and stem seals!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
High performance valve spring set
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Developed for the performance enthusiast
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Two required per valve, necessary for use with certain supertech valves
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Replacement exhaust valve
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Two required per valve, necessary for use with certain supertech valves
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms