Help! New catback problems after having it installed! Motor Mount inserts??

well bro i guess your other option is just to leave the cat off and run a straight pipe from the header to the exhaust. the only way this will affect your car is that it might have a higher low-end and itll be twice as loud but....if you live in a state that does emissions testing id say find a new shop and have them install it because it sounds like this dude at the shop your at now just wants to see how much he can push you before you say youve had enough, so i'd either find a new shop or just leave the cat off but yea i agree with the dude above me, motor mounts arent for exhaust systems.....theyre MOTOR mounts!! lol but i wouldnt let this dude get another penny off you, go to a shop thats worth your time. hope everything works for ya bro....later