What's a Good Xbox 360 Exclusive/CrossBuy Racing Game?

Looking for one that me and my brother can play splitscreen on. He loves Forza but it seems only Forza Horizon 2 is available on the store and it isn't 2 player. I would appreciate any feedback, thanks.

Split/Second is a fun racer on 360, played splitscreen too.

All the Forza Motorsport titles are splitscreen, also there's good 'ol fashion PGR 3&4.

Also you can usually find your co-op questions on this
site answered fairly well too. http://www.co-optimus.com

Blur is an action racing game similar to Mario kart where there are power ups to mess up other drivers. It adds an element of randomness that in my experience adds to the fun of the game.