Yes, bro bmw7833 is correct. I did mine (replaced with Beisan seals) this morning and got a shock of my life. My inlet camshaft is out by almost one full height of the alu bar!!! No wonder my consumption was high at 11.6L/100km (city) and 10.6L/100km (outstation). After replacement of seals, took a test drive and immediately felt improvement and smooth for low end torque. I also met another member at the workshop who had his seals replaced last week for his e39 528i single vanos. He mentioned same improvement for low end torque plus he is now getting 9.2L/100km city driving.