2006-10-09 15:55:09 · 5 answers · asked by afd1639 1 in Cars & Transportation ➔ Other - Cars & Transportation
You will get better gas mileage, and go ahead and take out the catalytic converter unless you have emissions testing. You do not need it, its only a restriction in your exhaust, and your car will actually run BETTER without it. NO car in the world NEEDS ANY backpressure. ZERO backpressure is the best case scenario. A sh-t ton of people think its necassary to get the exhaust gasses out but they're wrong, exhaust gasses leave the car via a syphon effect, where the end of the exhaust pipe litterally sucks air out. For this reason, you shouldn't go any bigger than 2.5 inches on exhast piping and 3 inches on tail pipe, but it needs no backpressure so it will run better. However, since your car is a 1999, when you take the catalytic converter out you will get a check engine light due to the post-catalyst oxygen sensor not reading the catalytic converter because you took it out. This won't hurt anything at all, but if anything serious ever happens you wouldn't know because your check engine light would always be on, so the best thing to do is take out the catalytic converter and attach an oxygen sensor simulator to the sensor, the run about 40 bucks, and any racing shop should have them. AS for the duel exhast, that will also help your gas mileage as long as you keep both sides the same length and design (which is hard)
2006-10-09 16:36:39 · answer #1 · answered by gregorybd 2 · 0⤊ 1⤋
Modern vehicles that have computer controlled engines are optimized for fuel economy the way they come from the factory. Dual, straight exhaust will only help with the outflow of exhaust. If the exhaust flows out faster, air must flow in faster to replace it. More air, more fuel, less mileage.
2006-10-09 19:14:50 · answer #2 · answered by eferrell01 7 · 0⤊ 0⤋
you will need to keep your cat to be legal and for back pressure. It won't run right without back pressure. But go ahead and try it, what the h-ll. If you could get by without all that exhaust your gas mileage would improve as if you put on headers. duel exhaust is kinda nuts for a straight six. double trouble we used to call it.
2006-10-09 16:09:30 · answer #3 · answered by La-z Ike 4 · 1⤊ 0⤋
Won't that _help_ your mileage? Assuming you drive it the same...
2006-10-09 16:03:45 · answer #4 · answered by Jim S 5 · 0⤊ 0⤋
no :)
2006-10-09 15:56:22 · answer #5 · answered by Anonymous · 0⤊ 0⤋