that is true
true dual by far
If it needs new spark plugs then that will help gas mileage but if the plugs are firing ok and gapped correctly then new plugs will not help. Adding true dual exhausts will add a little power and may help mileage slightly but you will prpbably never ever recoup the cost of the dual exhaust system in fuel savings.
It could be true, if the aftermarket converter is not as efficient as the OEM.
The advantages of having dual exhaust, if it is a true dual exhaust, include increased gas mileage, cooler engine temperature, and more engine horsepower. However, if it is not a true dual exhaust, it doesn't matter how many exhaust ports there are, there will be no advantage.
No it does not because my friend has one with true dual exhaust and it is 5 times more louder and it crackles over 3,000 rpm
yes I believe it did.
yes you can on eBay too
you can only use the single in and dual muffler on the rear to get dual exhaust.there is no way to use true dual pipes under the car.the floor pan is to low and they cant cross the rear axle.....
Yes you can.
I would guess it is a little help since it does relieve a little back pressure. Back in the old days when cars had true duel exhaust, the pipes ran straight back on each side. Now, the exhuast usually comes from a single pipe off the exhaust manifold, into the catalytic converter at which point it either splits and goes to separate mufflers and then out the back OR a single pipe back to one muffler which has two outlets for the duels. At best either is mainly for the effect and the sound. A few vehicles do have two cats and entire systems but not Chevy cars as far as I know (except vettes and some older trucks)................actually not true my caprice 94 9c1 5.7 350 and everybody elses do have true dual exhaust. only the 94, 95, and 96 caprice and impalas with 5.7 350's have this though!