S4 with manifolds

["K.Benjawan" <u3520170@au.ac.th>]

                Hello , anybody here try RS2 header manifold on Audi S4 ?
   After I finish my exam, my family will go to USA. and I'm going to
   send draft to JOE HOPPEN MOTORSPORT INC. to order the manifold    next week.
                What should I expect from that 730$ manifold ?
    better respond or more peak power,or both ?

                                                                Thanks
                                                                        Ben