Certified Upgraded Valve springs for all N57 & B57 engines

Unlike other sellers who dont offer conformity these valve springs are produced using chrome-silicon spring steel conforming to SAE 9254 and ASTM A401 specifications.

57% stiffer than original valve springs.

11.5% thicker springs

Higher spring seat pressure

Solving valve float issues with high boost pressures

For stock camshafts only

Electroplated coating

Can be fitted without removing the cylinder head

Highly reccomended to get a mechanic to fit these for you. Fitting then yourself you do so at your own risk. Its reccomended to change the valve stem seals at the same time as the upgraded springs.

EMP causes valve float and EMP is typically double what the boost pressure is

I also sell injector copper washer seals which are single use only and you will need to change them when you disasemble your head. I do also supply o-rings for the injectors too so please see my other items

THESE WILL FIT FOLLOWING VEHICLES