Upgrade your S55 Engine with this all Inclusive 1000hp Capable Kit from 5150!
Upgrade your S55 Engine with this all Inclusive 1000hp Capable Kit from 5150!
Includes all the valve stems needed for repairing, replacing, or upgrading your BMW's valves and stem seals!
Upgrade Your Factory Intake and Exhaust Valves
Upgrade your valvetrain with Supertech components
Two required per valve, necessary for use with certain supertech valves
This product was last offered at the strikethrough price on
03-04-2026
Inconel-Nimonic / Sodium Filled, Std 28mm, set of 12.
Standard size. 30.1mm intake, 28.5mm exhaust.
Performance valve springs for S54 engines.
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
07-20-2026
The perfect seal for repairing, replacing, or upgrading your valves and stem seals!
Valve spring replacement kit
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!
Developed for the performance enthusiast
High performance valve spring set
Inconel-Nimonic / Sodium Filled, oversize 28.50mm (+0.5mm), set of 12.
Replacement exhaust valve