I'm new here but anyway, got a 2002 wrx. It has an AEM cold air intake and i think it's a SRS catback exhaust. These were already on the vehicle when i got it. What i want to do now is complete the exhaust with equal lenght headers and down pipe. I want to install a front mount intercooler kit, intake manifold, and throttlebody. I have no idea if tuning is require or if there is anything i should or should not do. Vehicle has about 150k but the cylinder heads have been redone - new valves, springs, and seals. New head gaskets, bolts and complete timing belt kit with rollers and water pump. Any help?