Not in our case. That only applies to symmetrical exhausts, not our lop-sided exhausts.

 

A metal made of what, medal?

 

 

Nooo, not a freakin medal. Here, you must need a picture -

 

Cats and Tips/Exits updated!

 

I'm not 100% on this one. I know that H pipes lower the torque curve on symmetrical systems, but I'm sure it does the same for our unsymmetrical system as well. In theory, gases will take the path of least resistance. Gases are going to flow through an H crossover easier than the merging concept of the X pipe. I don't see how the length of the left and right bank changes this theory. The least path of resistance is still the same.

 

Then a test must be conducted! Quickly MGDfan, commence testing!

 

 

If I (or MGD) can find some supporting data, I will go back and change/add it for clarification.

 

you will be hard pressed to see any gains from any type of crossover. cross overs give the exhaust a different tone. Its about preference. If you have heard a vehicle with true duals with out a cross over (especially straight pipes) you will hear a pop pop pop sound from individual firing banks. With a cross over you get a more even sound coming from the exhaust. Also a SISO will out perform a SIDO every day of the week. The Y where the exhaust splits is a restriction and hinders the flow of the exhaust

 

That can be true, but most of the restriction comes from the OEM Y-pipe and intermediate pipe. I've never seen any data supporting that claim. All I've seen and learned is that SISO's and SIDO's perform identically. Sound projection and looks is the only real difference in the 2.

 

Very nice write up! Your ontop of it all punisher

 

Yep, left bank is 2.5" before and after the first 90. The 90 itself is 2.25". So gases/flow are restricted in two ways (bend & diameter reduction).

Right bank. - Before the split, there's another slight diameter reduction/ slight bend.

 

So I have a question....On my 07 XLT with the 5.4 I have a magnaflow dumped after the muffler. I was originally wanting a quite tone not to crazy loud but after having the muffler on for a few months and doing many other mods to the truck (mostly appearance) I think I want something with some kind of aggressive sound. After reading the other post I will more than likely get some hi-flows. The sound of just the magnaflow is pretty quite by itself. If I had the exhaust dumped after the axle or even a foot or 2 after the muffler would that help with getting a better sound ecspecially after adding some hi-flows?

 

^ Throw them damn turn downs in the trash and run a pair of 3.5" tips in front of the rear tire. You will be supersized how much better it will sound. Then add 94106 cats if need.