hey guys im having this problem where my catback keeps melting....just the other night wen i was driving my car on the freeway the car start to jolt then suddenly this clanking noise start to come on...& i know its the cat back again bcoz i have had this happen b4...i replaced my catback 3 times already in 3 months & its costing me.....wat do u reckons causing dis problem maybe a bad ignition system??, spark?, or replace spark plugs but ive got the iridium ones in there .... the engine is a silvertop 20v & i always put premium unleaded
cheers ramon