Round Collector Exhaust Gasket Used For 2-Bolt x 2 1/2" Flange 0 Round Collector Exhaust Gasket (2-Bolt x 2 1/2" Flange) If you plan to connect your header to the rest of your exhaust, you will need a collector gasket. OEM gaskets feature a carbon material and... $5.69 Quick view add to cart Add Wish List add to cart