Washers to increase valve spring tension BMW M43B16 M43B18 M43B19

Washers dedicated to BMW M43B16 M43B18 M43B19 engines, increasing the preload of valve springs.
Increased preload of valve springs improves the closing of valves at high revs.
The modification is necessary for turbocharged engines, where the problem of misfire on boost or lack of power generation above 5,000 RPM is common.
Thanks to the modification, the turbocharged engine can safely generate power even up to 7,500 RPM.

Precision washers made of hardened, surface-hardened steel.