I would only reccomened get a full catback..mandrel bent.. from like magnaflow,mossey, nismo..greddy ..etc.. thats from my experience.. dont waste ur money on a custom.. it realy doesnt come out cheap at all..find a used catback,,, if ur on a buget..
but for installers.. My mechanic rocks.. its R/C automotive in yorba linda..off the 91 (imperial exit is probably best)..call them tell them ocean refered u..
714-528-5985 ..im trying to get some b15sentra.net price breaks.. but still hes reasonable already..