This is just a general inquiry. I've heard that dual exhaust systems have a crossover pipe to "scavenge exhaust". What does this mean and is it necessary? The reason I ask is because a friend of mine has duals on his car but without the crossover. He seems to think it's absence is causing this funny vibrating sound from 1000 - 2000 rpm.

 

It equalizes pressure of the pipes and helps in scavenging by giving exhaust pulses an alternate route to exit - thats why the X pipe is better than the H pipe - the exhaust flow can move quicker to the other pipe by not having to make a 90deg turn

you'll get about 10 extra horeses versus not having one

About the vibration - I don't know- When I had single exhaust I use to get a vibration at around 3grand where my torque peaked

 

why is it that the two pipes need to be connected in some way?

 

are you kidding? the first sentence in the post YOU quoted answers that.....

 

Oh, ya, i suppose it does lol
wouldnt that be quite difficult on a thirdgen? I mean, its already hard enuf to get a true dual setup in the first place

 

not really, if you do a dual setup, following the stock routing, with 2 pipes side by side, a X pipe would be simple. However, you can fit a single 4" pipe in there with little headache, so i still fail to see the point of most of the interest in a 100 percent custom PIT-f'ing-A dual setup, when a single 4" fits pretty darn well and will support more power than 95 percent of the people on this board put out. Only real difference is the sound the car makes.

 

And there you have it! Some folks will put a lot of effort (and money) into finding just the right rumble for their toy. It's a big part of the V8 joy. I miss it with the 6.

 

Exactaly! lol, and if im gonna go through all the trouble of putting a dual on, its gonna be pretty legit. i dont think that ill really run into ground clearence issues, because the way my exaust is right now it hangs underneath everything, and i never have any problems with it

 

does anybody realize that the original post was almost 11 years ago to the day?

 

Apparently not. Where's Pinhead?