Originally Posted by Alias
So much for all that R & D
I guess you could look at it one of two ways (AKA glass half-empty or half-full): 1) Dinan did some amount of R&D to learn and develop what they felt was the best solution-- one which happened to involve some existing OEM BMW parts; OR 2) Dinan is ripping people off because they didn't develop their own solution and parts from scratch.
Either way, they obviously did do the R&D and arrived at the solution they felt offered the best compromise, which upgraded performance handling, without rendering it unpleasant for street use. The simple fact that their solution is something that we now know you can do yourself (with readily available parts) does not mean that they've done anything deceptive or predatory, because they did fund the R&D to arrive at their proposed modification.