I have a 95 uk wrx classic and want to upgrade the ecu , exhaust and air intake
What ecu do i need and recommendations on exhaust etc

 

ECU wise have a look here for possibly the best options www.jollygreenmonster.co.uk as he maps the most popular models (he is by no means the only person obviously but gives you a price range)

Uprate the panel filter unless you are fitting a FMIC.

Exhaust options good range here Impreza exhaust systems, downpipe, centre section decat systems and de-cat, Afterburner, Ninja and Racebox :