That's from a case mentioned in the OBX thread. Many forums are claiming great results from OBX on many different applications. Sure you are going to have bad apples in the bunch somewhere. I've had figment issues from Hedman, Cyclone, Blackjack, Patriot, and yes...even Hooker. I've never personally used, or even seen a set of OBX headers, but there are only 2 options for your Ex. 5.0...they are OBX and Torque Monster. The OBX are an obvious Chinese knockoff of the TMs, but for half the cost. TM is also nearing impossibility to aquire.