I got it from a 2wd 03 and was told it was a 3v. It has no bottleneck in it. So I assumed the previous owner knew his stuff lol. I will try to get a vid up tomorrow. It sounds good tho, not loud at idle but it does kinda cackle above 2500.

 

He didn't know what he was talking about, no 3V came in an 03'.

 

So doing the why pipe will not help with more towing power?

 

Replacing the stock T pipe with a good Y pipe will deliver a little more performance to help with towing chores, headers will be even better if you can fit the cost into your budget. Both should also make a very small MPG improvement, that can quickly disappear from the driver enjoying that new power boost!

 

Doing just the y-pipe on the 2-valve V10 will definitely help low-end throttle response. It equates to a quicker application of torque whenever you hit the go-pedal.

Whether or not that helps overall towing heavy, I can't say. Empty, it makes a noticeable difference.

Just be aware you may get the well-known "flutter" - which to me just sounds like extra exhaust noise - good noise though

 

I did the Y-pipe convert and definitely makes a difference at low rpm. I did have the flutter afterwards. I got the 5 star tuner with pipe as pkg deal. I waited a few days to see how just the pipe would make a difference before installing tunes. After programming with the 87 octane performance tune, flutter is barely noticable.
Truck runs great!!

 

You should run the performance tune and just tell it you have 91 octane then run regular gas. I picked up almost 2mpg in the city from 9.6 to anywhere from 10.8 to 11.2

 

I dunno, I have a 2 valve and I see no restrictions...

 

You might have the original y-pipe that didn't have those restrictions at the "Y". The problem called "flutter" caused Ford to come out with the necked-down Y-pipe.

I think this was somewhere in the 2000 model year. My 2001 had the necked-down Y-pipe.

 

Installed the SPD Y pipe on our 2003 all stock 3.73 a few months ago.
After 2k miles of towing gas mileage doesn't seem any better.
No change in exhaust sound, very quiet as always.
It has better low-end throttle response, get up and go, which makes it worth it at intersections when pulling a 7k trailer.

 

That is the old "rams horn" y-pipe that came on 99' and some 2000 trucks. Ford later changed it to the the y-pipe with the two necked down sections to get rid of exhaust flutter. It got rid of the flutter, but it also got rid of some power.

 

That's exactly my impression when I did mine. Better off-idle throttle response, but overall, NO improvement in high-end power.

 

I noticed on 5 Star's site that they sell a replacement for the ram's horn style that I have(post 38). It doesn't look like there's much restriction??? I am thinking of giving them a call and hear their 'splanation.

 

Someone should attempt to install an Econoline van Y in your trucks.
It appears to be some hot rod stuff- big piping, factory mandrel bent without crimping, no rams horn 180degree turns.

I wonder specifically what would prevent fitment.

 

SO, I got this huge response to my question at 5 Star Tuning.

"I am curious as to why you sell a replacement Y pipe to replace the ram's horn on my 2000 Ford Excursion 6.8l 2wd XLT.

It makes sense for the ones with the reduction pipe(s), but does the 180 of the ram's horn really restrict things much?"

The very wordy response

yes it works 10 hp and 10 tq



Their ads claim the Y pipe is a 33hp and 35 torque improvement over the restricted style..so only a 1/3 comparative improvement to the ram's horn.

Seems hardly worth it for 10%, and I don't notice any flutter.