Up for sale is FMF RCT S/S REPLACEMENT END CAP KIT 40641. The vendor part number is 40641. Please read title to know what you are getting. The catalog decription.... is Now offering complete end cap rebuild kits. Whether it be for a Powercore 4, Q4, Factory 4.1 or the new RCT we have you handled. The kit includes Stainless Steel, Titanium, or Carbon Fiber (RCT Only) end cap, 3/16 stainless steel rivets, and strap mounts to secure end cap to canister.