If you’ve spent any time watching Jerry Seinfeld’s coolest cars rolling down the street during episodes of Comedians in Cars Getting Coffee, you know he knows fine automobiles. You’re probably also aware that he’s a die-hard Porsche fanatic. According to Schumacher Cargo Logistics, “at one time he owned a record 46 Porsche models in the over 150 car collection.” This customized 2011 Porsche 911 GT3 RS 4.0 is one of those cars. Serial number 009 was built in collaboration between Porsche Exclusive and Seinfeld himself to take the already insane specs of the 997-generation of 911s and kicking them up a notch with further weight reductions (bare carbon fiber bodywork) and a murdered out appearance. The car will be auctioned off at the end of October during RM Sotheby’s Porsche 70th Anniversary Sale at the Porsche Experience Center in Atlanta. There’s no word on price estimate, but seeing as how it’s a Seinfeld exclusive, the “final and most expensive GT3 RS 4.0 produced” and “perhaps the most desirable GT3 RS 4.0 in existence,” we’re willing to bet it will fetch seven figures.