I found that Nick Gurnell's 3 hole tapered shock pistons transformed my 22 and really tamed the handling to being very predictable,
search for 'Nick' and his thread in the Losi section, really helpful, knowledgable chap
+1.5mm aluminium rear wheel hexes have dialled out some of the excessive steering characteristics too.
Gear Diff is next thing to be fitted but i'm sceptical over perfomance gains in a 2WD and don't mind the maintainence or setting up of a ball diff... worth a try as they are reasonable cost wise.
Must get a Cream weight too
I'd spend the most money on rear tyres and track time, that's what will benefit you more than bling to bolt on.
