There's not really to much added weight with duel's. Maybe 50LBS something like that. But you could always "Dyno Matt" the inside of the car. The place that I go to they sell it 50 buck's a roll. You will need 3 roll's to do both door, and 4 to do the floor. They usually charge about 50 a roll to put in. So it's up to you what you wont to do, maybe a different muffler might help.
