The 11 cars now available in September's Pennzoil car pack for Forza Motorsport 4 be all pretty ... slick. For 560 MS Points ($7) ye'll pillage a couple a Vipers, an Alfa Romeo 33 Stradale 'n a '53 Corvette, just t' name a few. The full list a the cars can be seen past the break.

Players that picked up a season pass for the game will have t' shell out money for this DLC pack, as the last add-on t' be included in the pass launched in April. New Community Monthly Rivals Mode events, including one that features the Pennzoil-sponsored Vipers, accompany this new release.