I have a Velocity adjustable throttle booster for sale, brand new. I bought it last year from a vendor on here, and was told it would work for my C63 but the plugs are totally different. The plugs DO fit the W211 E55 however as I tested it, and did a quick drive around the block and it works as advertised. Sadly, I couldn't even get this exchanged for a C63 one and gave up on trying to return it. It has been sitting on my desk for months now so I'm finally going to try and sell it to someone who can use it.

$250 shipped, and I do have PayPal. Send me a PM if interested.

And in case you are wondering more about the booster:
http://www.pyspeed.com/product-p/rd-8010.htm

 

Booster is currently pending.

 

Just wanted to list this back up for sale. Buyer never came through and I didn't bother to update thread until now. I've included a picture below as well.

 

Any takers before I eBay it?