Dedicated shims for BMW M43B16 M43B18 M43B19 engines, increasing valve spring preload.
Increased valve spring preload improves valve closing at high RPMs.
This modification is necessary for turbocharged engines that frequently experience misfires under boost or a lack of power generation above 5000 RPM.
With this modification, a turbocharged engine can safely generate power up to 7500 RPM.
Precision shims made of hardened, surface-hardened steel.
If the product status is “Made to Order,” please contact us to determine the exact delivery date.
Usually, production time does not exceed 2 weeks, but in case of a high volume of orders, it may extend up to a month.