For those of you who have installed this exhaust. Did you use the factory donut gasket? According to Greddy, this should be replaced with their special composite gasket and bolts, replacing the factory spring bolts and donut. However, ft86speedfactory and fteightysix say to use the spring bolts and donut. What did you do when installing? The Greddy flange would have to have a concave flange to accept the donut.
