Any one ever try one of these Downpipe / intercooler combos off ebay? I'm getting a Miltek and a Forged for my F55 since it's such a pain to install the DP and intercooler, I don't want to risk it. However $550 for both sounds pretty tempting.

https://www.ebay.com/itm/Turbo-Catle...0AAOSwTNBd3x9y

 

Their feedback seems solid, just 1 neutral and no negatives. You will be saving at least $1000. If it were me, I might get it if I am doing the installation myself. I would just see it as a $550 risk. But if I would have to pay for the install and potential removal if the parts do not meet expectations, I would just get the proven parts rather than risk the $550 plus labor costs.