OK I want to do a few mild up grades to my 2003 2.4t , I don't want to go to crazy cause the car is my daily driver and don't want to do any tunning and I would like to keep the great mpg I'm getting ( compared to my highly modded 03 maxima). So what's the stock size of are intake charge pipe ? I would like to do FMI but keep the stock size piping and stock piping and just reroute a nicer better looking intercooler up front...
Any help would be great

 

2.5" is pipe diameter and exhaust

 

Sure 2.5 on the intake side though it was smaller stock ... thanks
Plans just to do front mount and delete intake box and put a cone filter there and custom 3'' cat back with resonator delete ... I want to give it little of that swooosh pssst turbo sound

 

here is a link to a great company that many guys use as a model when building there FMIC
PhMIC [Phuzzy Motorsports] - $639.00 : Phuzzy Motorsports..
Look at the direction is gives a nice look at whats needed for bends and lengths..

GL