yes.
you want the X as far forward as possible.

 

Don't "X" pipes make a better sound, where "H" pipe makes more power?

 

PB lvl 2 for me, not lived an easy life so far, but its not complaining!

 

no.




well, not as far as i understand the physics of exhaust scavenging.

 

why is that ...?? and do you mean closer to the headers or farter from the headers..??

 

NASCAR has been using X-pipes since 1991 and they found that the closer they were to the engine the more HP they made. On a 750 HP engine they would make 8-10 more horses however when they were added just before they exited on the side, the HP gain was less than 1. On a truck, if you add an X pipe after the cats you get a mellow sound and little hp. The 2011 Corvette has an X pipe option on the ZR1 and Z06 after the cats but are not advertising any HP gains as I recall.

 

Don't the exhaust pipes have to be equal length for the x-pipe to function as designed? So if you put the x in place of the y, it will change the tone, but not really help scavenging so much?

 

Your right, I double checked this time, and I had it backwards.

 

As close to the header collectors as possible.

Eh, not necessarily. Ideally we'd all love to have 100% equal length exhaust, but anything less than equal length just lessens the efficiency some but doesn't totally negate the effects. Having the x-pipe is still worth it.

An equalizer pipe, be it x- or h-, does just that: equalizes the pressures/volumes of exhaust gases passing through the pipes. The closer to the collectors we go, the hotter the gases are and the better flowing they are, hence why an equalizer pipe is more effective here than farther away from the collectors.

 

My thinking about X pipes is they introduce extra bends into the exhaust system. I would rather have a properly tuned Y pipe setup than an X or H. I'm running dual 3" into a single 4" Y then into a Hooker Maxflow muffler and it is very mellow for most driving and at WOT it screams like a NASCAR.