I used FTP's boost and charge pipes on my N47 328d. I agree with you that they make a good product and at a good price. I found it interesting how they use an "x-ring" vs the tapered o-ring BMW uses in the coupler to the FMIC inlet/outlets. The connection on mine was SUPER solid. Also their CEO was very responsive and helpful when I enquired about their product.
The only complaint I have is the hose clamps they include are kind of weak. I replaced the ones on mine with Breeze HTM clamps.
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