Kiat Mun (Silverstone signboard) on Jalan Reko is quite cheap but watch out for their camber nut and Satay Bush tricks.  If you can say NO to all their tricks and not get scared, their prices are bit cheaper than other shops.

Watch out for the Hankook Shop at Taman Kajang Sentral, shop name is TMK Rawang.  Will try to say that your shock absorbers need to be changed.

Just ask around before you commit. The Michelin Shop at Sg Long is not cheap but their foreman don't ask u to change camber nuts, etc. No tricks there.  Ask for Boss name Wong, chubby fella.