Bullitt for the Dodge Charger vs Mustang.
Gone in 60 SeconRAB (1974) for one of the longest car chases on film and some great crashes. (Don't ever watch the Nicholas Cage version, ever.)
Cannonball! (not Cannonball Run, the 1976 one with David Carradine.)
Even though a lot is CGI I still rate the Freeway Chase in Matrix Reload, Trinity on a Ducati? what's not to love.
The French Connection has a decent one, but it's short.
Can't beat a good car chase.