That truck sounds amazing, but a 4" exhaust will absolutely kill your mid and low end power...

Don't do it.

 

unfortunatly no i dont have a camera

 

at a certain point in 2005 ford stopped putting the dumb 4 cat system on and started using 2 like every other car in the world it seems.. so if u say so then ur truck already just has 2 which is great. at that time i already had a si/do 40 series. bought two 10 series offline and took them to the shop. he cut the stock Y pipe behind the cats and the 40 series off, leaving the two tail pipes in place. ran a seperate pipe to each 10 series, installed an H pipe, and re-connected the new mufflers to the old tail pipes in the rear. that cost me $320 and was the best money ive put into my truck. i had been thru 4 different exhausts. i highly reccomend this over straight pipes. recently i changed the exit to lightning style and that really changed the tone alot to more of a growl, but i still like it.

 

Straight pipes. Run 2.5"true duals X piped with no mufflers, much louder than a 40. If thats still quiet, hi-flow cats.

That truck has a 4" Dodge Diesel exhaust in it. Not exactly straight pipes but it is way too big of an exhaust.

 

Man is there any chance you could snap some pics of your whole system headers to tail? I have a buddie that can help me do this but showing is much better than reading

And I dont think I totally understand the point of a H i understand it helps share the cumbustion and help equalize but where is the benefit it looks like it would be a high rust area as we all know water sitting in the pipes is the enemy and with that crossover i appears that it would never really get "blown out" sure im sure it would get hot enough but on short runs it looks like it would be a good spot for the cancer to start ....Looking at the truck it looks like i would have to make the H around the bottom of the driveshaft where it goes in the back of the tranny is that true?

 

If i understand correctly he took off your cats so you dont have cats anymore... and connected the Short pipe to where he cutt off the cats (like next to the oilpan) and then ran the short pipe back to like right befor the rear end and put the 10 series and then ran it out the back?

 

you probably never heard one with an H pipe

 

i live away from home at college and baseball dont let me go home very often right now so it would be 4 weeks before i can do that. sorry man, but it really is very simple to do. just cut the stock Y pipe, and run two seperate pipes to the two seperate mufflers. when thats done put an H pipe about 2 feet past where the stock Y pipe was and your done.

 

i still have the front 2 cats (pre cats). i just replaced the back cats with 18inch straight pipe.

 

Cross Over Exhaust Pipe Explained... With all this discussion about changing Mufflers and Exhausts I thought I would take a moment to explain why you have a cross over pipe (what we call an H or X pipe!), and the difference in concept between the two popular designs. This might help you decide if you which you want to go with!

The firing order of all production V8s, regardless of make, has one cylinder in each bank that will fire within 90 degrees of crankshaft rotation of another cylinder in the same bank. This occurs twice during completion of the entire firing order. These two cylinders will be exhausting almost simultaneously into the same exhaust manifold system.

Full-length four-tube headers help separate these pulses until the collector is reached. If this is a full race car running "open exhaust", you will notice the collector dumps into a short open pipe at least 2.5 times the size of the header pipes, or the header pipes dump direct without a collector. This is done to avoid the conflict of pressure caused by the timing of the 2 counter firing cylinders, which will create back pressure and degrade torque, horsepower and general performance, especially at higher RPM.

On a full exhaust system, after the header tubes dump into the collectors, the two close firing cylinders are fighting each other for space in the collector and exhaust pipe. The result is reflected pressure waves traveling back up the exhaust system, backpressure, lost power and poor economy.

At the same time two cylinders exhaust in one bank, there is no activity in the opposite bank. The traditional H-pipe equalizer allows some of the excess pressure to bleed over to the 'quiet side' of the exhaust system, resulting in some low and mid-range torque improvements. At high RPMs, however, in traditional exhaust systems, the gases cannot bleed across the H-pipe fast enough to help power significantly. Performance systems with the H pipe design, attempt to over come this by using a shorter cross over pipe which is also slightly larger in diameter as the main exhaust, then would be used in a standard exhaust.

To overcome the power loss of "over loading" the H pipe design, Exhaust manufacturers came up with the X pipe design, which features a tangentially Siamese crossover junction to synchronize exhaust pulses. The X-pipe concept is to split the flow in the crossover junction, so the pressures on both banks will be equal and pulse-free after the crossover, regardless of the rpm. Volumetric efficiency and power are therefore improved at all engine speeds. The negative aspect to the X pipe design is, because of the crisscrossing of the flow stream, harmonic pulsations will develop on some systems at certain RPMs, which will be perceived as a buzzing or humming sound.

A newer concept is a "Channel Pipe", where as two pipes are welded together in parallel with a baffle in between them which allows for mismatched pressures and pulses to cross to the idle side while allowing full, uninterrupted or redirected flow of the exhaust stream through the system.

Also... There is yet another option.... The MAC Prochamber.

It looks like a box, or a muffler where the 2 header leads enter one end and then exit the other in the location of the H or X pipe.

It is essentially a combination of all three basic designs I discussed, incorporating the crossover flow of an X pipe – the open buffer of an H pipe and the passive pulse control of a ported baffle channel pipe. MAC is the ONLY maker to have this design.

Basically it combines the exhaust into a single box, where the 2 inlets extend into the box a few inches to prevent reversion and open dumping exhaust into the box. The outlets are flush with the back of the box and there is a baffle between the sides with ported slots directing the flow of the inlets to cross to the other side. The Box holds backpressure at a steady rate, which eliminates scavenging.

There are many who believe the Prochamber will give increased performance values. Everyone using them will tell you they make a deeper yet quieter tone to the exhaust note.

Professor Wizard
Retired MF Moderator
Mustang Forums

 

Haha....I've probably come close to hearing every exhaust imaginable, thats an understatement.