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affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Standard size. 30.1mm intake, 28.5mm exhaust.
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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
High performance valve spring kit including steel retainers. 75lb @ 37mm, 155lb @ 10mm
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The perfect seal for repairing, replacing, or upgrading your valves and stem seals!
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Valve spring replacement kit
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This product was last offered at the strikethrough price on
05-02-2026
Eliminate valve-float at high RPMs - 67lbs Seat Pressure at 35.70mm - Featuring steel retainers
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The perfect seal for repairing, replacing, or upgrading your valves and stem seals!
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High performance valve spring set
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Developed for the performance enthusiast
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Crucial Mod for any Camshaft Upgrade!
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Includes media blaster, walnut shell media and Genuine BMW vacuum adapter
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This product was last offered at the strikethrough price on
05-02-2026
Replacement Intake valve
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This product was last offered at the strikethrough price on
05-02-2026
Inconel-Nimonic / Sodium Filled, oversize 28.50mm (+0.5mm), set of 12.
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Located in the Cylinder Head
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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