Question..............How difficult would it be to make a car with a single exhaust into a dual exhaust ? Is it really difficult ? I seen some people with this on their car. I saw a 2002 Impala with dual exhaust as well as 2003 Intrepid. I have a 2001 Bonneville SE and this idea interests me

you will need some other engine mods to back up the loss in low end torque.

Like ?? This is just a beginning idea but it intrigues me

maybe an intake, headers, a chip
i like the idea of a supercharger (centrifical) on a norally aspirated car
?
others could be porting and polishin cerain parts

It'* real easy, it only takes money & time to install. Any real "Good" exhaust shop can give some pointers as towardds cost & what to run to best maximize the power.

The SLE has duals. Get a shop (or do it yourself) to convert you to that system. I believe on your car it is a simple Y pipe and an extra muffler, but don't quote me on that. I haven't been under a 2000+ for a long time.

I think I might ask on of my guy at a custom shop I go to if he could do something like this for me. I think it would look nice on my car. It would be different and I haven't seen anyone with a dual exhaust on a SE. I am gonna get a hold of him this weekend and see what he says. Anyone else got any other ideas for me about this ?

BTW: I was talking about "TRUE" dual exhaust, not just twin exhaust tail pipes!

Yeah..i've been told that you can actually lose performance doing this operation..thats why it kinda turned me off. Wouldn't just getting a nice quality flowmaster or magnaflow exhaust give you more performance..than just running straight duals? Obviously i understand that the concept that if he does a shitload of mods that the duals would be the better choice..i guess it just depends on how much he'* willing to spend on engine mods to back it up.

If you use the right size pipes, you wouldn't have a problem. I have thought about doing a true dual for a while now, and with everything that we will be doing this summer with my car, that may be one of the options. I haven't done the math yet but my guess would be a simple block plate where the crossover goes. Replace the crossover with a modified pipe that runs almost parallel to the original. I would use a dual in/dual out cat that would double as an "H" or pressure equalizer. Run the dual pipes side by side to just over the rear axle where they would branch to two separate small mufflers, then out the back. I think that the pipe after the cat would have to be between 1.75 and 2.25 inches and no larger, depending on the application.

Anyone interested?