Duel Exhaust

[thermal]

what other mods do u have?
like Glob said, i would save the money for something else. a dual exhaust on a 99 civic will drop your power and torque. u will lose plenty of your "pick-up" on the lower to middle RPM band. a dual set-up can cost u close to $1000, with maybe a 5 hp gain on a decent tuning OR just lose power due to back pressure loss. u have to consider mounting prices too. it's best to have a higher flowing exhaust system with a turbo set-up........keep us posted.