Does anyone has any information on the Free Flow Exhaust modification featured on the DOC website? I sent an e-mail to Mr. Simon Lees-Milne who had the modification performed on his car, but I haven't heard anything back yet (don't know if the message was able to reach him). Come next January my D will become eligible to become smog exempt, so I'm really interested in performing the conversion. Are the manifolds avalable pre assembled in a kit, or would I have to weld everything myself? Either way how much does it cost, how would I bypass the frequency valve, and so on. Thanks in advance! -Robert vin 6585