subaru does have aftermarket performance that they make themselves it is called STI sti is there performance division and this is the stock wrx. these car are pretty durable not sure how well when modified but they come with a turbo on them to keep them good the sti in the way of engine is jsut .5 liter more like 1 psi more boost bigger intercooler then liek wheels huge brakes interior stuff but im not gonna argue about mustang aftermarket i know it is huge