In terms of upgrades and modding, I've no experience and very little knowledge, although I've been trying to change that fact. I'm reading as much on this site and others as I possibly can, but I could still use a bit of help from those much more experienced. As the saying goes, a smart man learns from his mistakes, a wise man learns from the mistakes of others.
My end goal is to have a stealthy daily driver, suited to both start-stop journeys in and around the city, as well as letting rip on the country roads here in Donegal (rally country) and the odd track day.
I'm looking to improve acceleration, handling, responsiveness, top speed, ICE and exterior, in that order. However, I've got little funds, so I'll have to do this one step at a time.
Because of the weight of the car, it's quite poor off the line, so an increase in power should help this. Correct?
The handling isn't bad, however I'd like to improve it so that's it able to handle the planned power increases.
Strut Braces - are they worth it on the Legacy Wagon?
Brake Upgrades - The brakes are very good
Diffs - I don't know fully what a diff upgrade would do, could someone explain it to me?
Responsiveness & Top Speed
Engine Tuning should help with this, correct?
Intake - From what I understand/have seen on dynos, POD filters only give an increase of about 1.5%, CAI's again have an increase of about 2%, so are they worth it?
Throttle Body Spacer - a small hp gain, but appear to give a fuel economy increase.
Exhaust - I vaguely understand the difference between EL and UEL exhausts. UEL bolt on and exaggerate the boxer rumble, but EL will give better power gains, correct?
Cams - I have a SOHC, is it worth converting to a DOHC? What will this do in terms of performance?
Pistons - This would be a long way down the line in terms of mods, as they're not cheap.
ECU Tuning - Any plug and play ECU tuners?
Anything I'm missing/overlooking? What order should I go through the upgrades in? What gives me best bang for buck upgrades?