2006 Mazda MX-5

Simple but smart — this ’06 MX-5 swapped in a CSF race radiator to keep temps in check when stuff gets serious. Lightweight roadsters like the Miata live or die by cooling on long track days, and this upgrade buys consistent power delivery and fewer heat-related headaches. It’s the kind of practical mod owners add when they start pushing limits: invisible in photos but immediately appreciated on a hot afternoon or a multi-session track day. Rest of the car stays focused on steering and balance, now with better thermal confidence.