As for the x pipe in the muffler, dosent work, your putting the restriction back into the ex sytem your trying to remove ( Y pipe) , I blew out 3 dynomax ultra flows, a x design mufler.

Thiers no balancing of ex. gas, just pressure inside the mufler that will blow out the packing or seams in the mufler.

A x design mufler is pointless, it can't blance out ex flow, when its all ready un balanced due the the left ex manifold being longer than the right.

Running two free flowing muflers is better.

 

ok

because they have been proven, at the track, for years. Where have you been?

You sure about that? I've seen them numerous times. Just because your welder/you doesn't have the skills too make it work, that doesn't make it impossible.

Why would replacing the y pipe affect the o2 sensor? Have you even looked under a ram to see where the sensors are?

You may think that... Your motor has absolutely NO exhaust scavenging going on. This is hurting both HP and TQ. We're talking exhaust 101 here.

I agree that fuel savings are not a legitimate reason to modify the exhaust. They're actually a stupid reason. But you are completely ignoring the performance gains from removing the restrictive Y pipe. Please reference the pics I posted on the first page.

This I agree with also. A dual in/out muffler is NOT an x pipe. It's a massive restriction.

Wrong. The exhaust is designed with a number of factors in mind. While performace is certainly a consideration, the bigger consideration is cost. As you mentioned early, it is difficult to route an effective exhaust. That's why dodge cheaped out and gave this horrible unequal length exhaust with the crushing Y. Are you suggesting that one side of the motor has less exhaust pressure than the other, and that is why dodge made one side longer than the other?

By all means please do this very thing!

 

not mine, but a couple more pictures to show you that y pipes fit on 4wd hemis

 

Here is a pic of a good X pipe. The two pipes are connected in an X, but the flow of both pipes is left unrestricted. The result is a free flowing true dual exhaust with scavenging capability.




Here is a pic of bad X pipe. It actually restricts the exhaust. In essence this is not a dual exhaust. The 2 pipes are merged into one, and then reopened into 2. That is basically back to back Y pipes, not an X pipe

 

Here is a pic of a DI/DO muffler. Which one of the above X pipes does this remind you of?

 

Ok.. Post some pics with a H or x pipe, on a 4wd hemi, I have not seen any, yes a h pipe or the x pipe is better, ie on a car with no flue tank or transfer case.

On my truck, the o2 sensor was in the y pipe, right from the factery, when the y pipe went, the 02 sensor had to re tapped, as long as you keep the o2 sensors and catts, you will not get any check engine lights.

Yes, y pipe robs H/P, in my case, I went to the wrong mufler shop, bought the wrong mufler and its taken me far to long to get the performance gains, and mpg I wanted from the get go.

I would bet a engine would run better with = ex pipes of the manifold, bad design from Dodge, but its not stopping the engine from running, I'm trying to make the point that you can't balance out ex gass's to be = when the orginal set up from the factery is designed for cost, not performance.


Mpg dosent lie, on the high way I can pull up to 20 mpg in 6th gear, 1800 Rpms 60 mph, I have a 6sp manual, I have never had a issue with power in any gear, prior to the dual ex conversion, the stock boat anchor of a mufler added abought 6o pound of mpg robbing 15 mpg ( hand caculated )

My 2500 did not have the resonator muffler at the end of a 1500 ex sytem and the new 4rth gen ram so called dual ex has the y pipe, flowing into one mufler, than two out lets to the tail pipes.

The after market y pipe looks shrap.

 

Dynomax ultra flow is 100% crap, I was talked into this pos, and blew out a frew, replaced under warenty, tried the magna flow verssion, fried it as well.

 

thats how the x is in the muffler, so should i add a h pipe before the muffler ? i can get it done for 200 or 150 with out, and get the muffler tuesday afternoon and would like to get it done wedsday

 

x pipe or H pipe, in theory do the same thing, if you want the x pipe you don;t need a h pipe..

The x type mufler, dynomax, have fiberglass packing around the x, over time, two to three months, you will blow out the packing, it will rattle inside the mufler and sound not so good, like rocks in a tin can, or you will blow out the seams on the mufler, dyno max will waranty the mufler for a year, so get friendly with your mufler shop, you can go back as often as need be with in that year.

I was back to minute mufler in calgary three times with the dingle max mufler. ( dynomax x ultra flow )

I would go with the x pipe and run 2 free flowning muflers.

 

Are you talking about a chevy or something? A 2006 dodge has them no where near the y pipe. There is one right before each cat and one right after each cat.

The whole point of an X pipe is to balance out pressure and aid in scavenging.


I don't doubt you see gains with your system. My point is that you will see even better gains with a true X pipe.