so i got my 4-1 Stainless DC JDM. been looking for a freakin week for the collector gasket. found it at JDMHonda for 25 + shipping, other sites for 25-35$+ shipping.I finally call DC Sports and talk to customer service. They say just call honda and get a S2000 gasket, it fits perfect. 23$ later and a trip to honda and i am in business. Will post later on fitiment and dyno results.