I recently purchased a 1993 grand marquis with 62000 miles and is mechnically sound, I am looking for more horse power performance, is it expensive to convert to a dual exhaust system or am I better just going with a high flow muffler swingle outlet. Hello everyone

yes it is expensive, but you will see far more gains than you will with a dual outlet muffler.

I have a 1989 Cougar LS. I need to know where I can find a dual exhaust catback system. I hate the system that is on it right now it robs power. It has the dual out from manifold which goes into a dual inlet to single muffler.

but in many areas, adapting your exhaust system to a true duals etup is against emissions laws

but in many areas, adapting your exhaust system to a true duals etup is against emissions laws


ONLY if you bypass cats. If you install 2 cats for two pipes ypu will be fine.