Pretty sure there is no gasket between the bottom of the cat and the mid section. Long time since I did mine though
Collins Cp2 map. Ramair induction. Mountune mud flaps. Scorpion Sports Cat. Scorpion Tracker. Wind deflectors. NB washer jets and shark fin aerial. EBC Grooved discs, YellowStuff pads. Airtec Intercooler, Miltek cat back with titanium tips. Collins quickshift. DSC Controller