Price includes a $40 refundable tool rental deposit.
When rebuilding your own vanos it's very easy to strip out the stock piston cap as it's made from a soft metal and requires a special socket due to the very shallow hex machined into the top. We've seen this countless times and unfortunately this part is not available from BMW separately! Our solution was to redesign our own replacement cap that uses a much more durable securing method.
If you've damaged your cap trying to remove it or you want to upgrade your existing cap while rebuilding your own vanos then we have the best (and likely the only) solution on the market.
Our caps are CNC machined from high strength steel (vs. the soft metal on the original) and installs with a special pin tool so it's virtually impossible to damage the cap.
We sell the cap as a kit that includes the special tool required for installation, and when you are done you can send the tool back for a $40 refund.