Hack Engineering Vanos Oil Restrictor O Rings (S54)
$10.35
$18.63
The Vanos oil restrictor O rings should be changed at regular intervals on the S54 engine (E46 M3, late Z3M and Z4M). This kit includes the two associated O rings but in Viton, a material of far greater quality and rating than BMW’s cheap O rings. Results in greater oil pressure regulation and service life. Includes uprated Viton O rings, as direct replacements for BMW part numbers: 11311318659 – small O ring 11361403325 – large O ring
