Sacramento Meets/Chat

SuperDave

The AAM midpipe bolts up at the stock location. So any axle back (stock located), or stock muffler will bolt up to it.

__________________

myotorsports

Seems like one draw back of the GTHMS is it is not a true dual with H pipe- it's a Y. Looks like most are... The MXP is an H pipe- I'll have to listen to yours closer next time... Nice setup...

Tempestz

Yes the GTHAUS fits the AAM midpipe perfectly.

But as your saying GTHAUS isn't true dual, but neither is stillen catback and isn't it the highest gain catback next to motordyne? Motordyne isn't true dual either. So all the major gain exhaust systems are the Ypipe design. Rather than X or H other than FI exhaust

myotorsports

Excellent point taken, the results are what REALLY matters!!!

Tempestz

Yeah I was researching that point for the longest time on why stillen and motordyne made so much compared to the rest. And almost all the other exhausts used the Hpipe or x pipe design. Granted in theory they would make the most HP and tq design, they don't. Now this is actually where getting into power under the curve matters... An X pipe/ypipe design will give you the most power down low, because the exhaust gases and closer to mixing or mixing directly which in turn creates back pressure without the use of a muffler or resonator. So the exhaust gases are not slowed down by the packing, which helps with exhaust scavenging. The h pipe helps in high rpm power cuz it equalizes exhaust pulses and they will flow better in upper RPM.

The point I cannot directly explain is how motordyne, and stillen still make the most power in the high rpm utilizing the ypipe design. Granted motordyne uses the indirect resonator on the tail pipes(I forgot the actual name for that) and it creates even more exhaust scavenging. These points are why I chose the ypipe design with a non resonated midpipe and two straight through mufflers as my exhaust of choice. Least path if resistance for me.

Cbtech

__________________

onzedge

__________________

Koni|Swift|Michelin|Motordyne|Berk|RJM Performance|Gates|SPL|Motul|Technafit|Ate Super Blue|Hawk
Tommy Kaira|Momo|Optima|Hella|Hotchkis|Red Line|ZSpeed|Stillen|B&M|H&R

NINJA

H-pipe is why I was only looking at a few exhausts. The stock nismo has a similar setup so wanted to match that for performance. MXP and AAM were two that offered this. On each of their websites they claim great gains. If the AAM tails will match up to the MXP mid, I may do a switcharoo.

Great picture CB.

__________________

Tempestz

Sorry for the boredom guys... Lol

Tempestz

Can you buy just the MXP midpipe?

NINJA

Not sure. Got it through a forum vendor.

__________________

Tempestz

The midpipe, or the full exhaust

SuperDave

Great information and pondering of x-y-h differences. As far as I understand, the x design will make more power throughout the rpm band over the h, since it allows a more free flow path and reduces exhaust scavenging, but the loss of backpressure causes a loss of torque, which is where the h pipe design out performs. Albeit, we are talking measurements of 1 and 2, nothing too significant. If you think about it, the y pipe design is really just an elongated x pipe, and that is probably why motordyne and stillen are making the same type of power gains in the same power band. A lot comes into play, angle of the y, length of the y before the x split again, backpressure from the mufflers and baffles, and things like test pipes, hfcs, or stock cats and their age can really offset the numbers as well.

__________________

NINJA

I purchased the full exhaust for around $1200. Vendor was B2 Auto Designs.

__________________

SuperDave

FYI this dude on facebook (SVGZ Depot) is selling his 40th wheels if anyone is interested,

__________________