anyone know what flange a greddy 18g is? i built a new exhaust and put on consisting of 3 cherry bomb glass packs, a 2.5 electric cut out just after the turbo, and some stainless piping and a tip, it's quite as all get out and it's loud and cammin when i need it to be. but the back pressure from the glass packs has cause my gasket between the manifold and turbo has blown out and i have been rolling around with it for a bit but im so tired of hearing it now, i know its a 4 bolt not a 3, i have included some pictures to help determine what i need, i can do the work just not sure where to look up what i need, any help is greatly appreciated!