Looking to purchase new turbo back system for my 03 cc dually. Have looked at the dppi dual ss system and the new banks system. Would like to hear from anyone who has either of these installed on their trucks. Any other comments would be appreciated.

 

Spndebobshane;
Have you figured out which exhaust to go with? I too have been looking for a new exhaust! I have look at dppi, Hogg, and others, just not sure which on is the best for the Strokes. I do know it need to be at least the 4" kind. Makes much better numbers on horses and torque. Hope we can get a few more inputs on the right exhaust for the trucks!

 

I personally got a no-name 3.5" downpipe to 4" turbo-back system from a local guy (Quadzilla) before the group purchase for the Exhaust was organized here...
I went with an aluminized system since here in Texus, they NEVER use salt in the winter and I typically trade vehicles way before the life expectancy of the aluminized...
And @ $325 it was a bargain and has performed well....
I did not do any scientific measurement, but definetly noticed an improvement in performance from the muffler delete pipe I had on before...

I wouldn't go with a 4" downpipe, you will run into clearance problems with the seam in the floorboard... Some have bent that seam out of the way for the 4", but this manderel (sic) bent 3.5" DP gives me excellent scavenging for good egt reduction...

As far as THE right one for the trucks ? ANY new downpipe and anything behind it will be a tremendous improvement over the "crushed can" stock downpipe !

And I would surmise that most of the exhaust are pretty much the same -- i mean it's just a pipe and just so long as it has manderal bends, it's more or less equivalent (our butt-o-meters will not feel the slight differences !)

So don't wait too long, get your weight down by removing that "refrigerator" sized stock muffler and lower your egt's by opeining up the tiny stock downpipe...
and then it's ready for your Diablo Predator that will wake up the beast !
And give you the "Predatory Grin" !!!

 

Try the Hog system. Mine went in like a snap. JD is correct about clearance on a 4 inch downpipe, but the clearance issue is only at the crease where the floorboard and firewall of the cab are formed together. You can make adequate room with a floor jack in about 5 minutes. The 4 inch will significantly improve throttle response and get rid of most turbo lag; however the 3.5 inch will most certainly still solve any EGT issues (assuming it has a straight through, or similar type muffler)

For maximum performance, go with a system that comes out behind the running board. Once the muffler and/or cat is gone, the only other restrictions are in the bends over the rear axle. You only need this if you are planning to push it to maximum performance.

As for removing the cat, there are lots of arguments around here about that. Mine is gone. Most of the exhaust systems do not have provisions for them to be retained; only the Banks does as I know. It can be cut and retrofitted to any of them, however. Some people claim that it is against the law, you will get prosecuted for it, blah blah . I have heard of NOONE here that has ANY firsthand experience of getting in ANY kind of trouble for it. Only hear-say stories. Use your own judgement about the Cat.

 

I replaced my exhaust system with 4" stainless steel system that has a 3-1/2" - 4" downtube and a Magna-flow muffler. The Cat was removed but retained if I find myself having to put it back on someday. It's sad that the stock systems rust right away and I'm glad to have it all off.

The day after the system was installed I went from Las Vegas to SLC with the bed loaded and noticed a slight improvement in power from the reduced backpressure and a very welcome 2+ MPG improvement in fuel economy right away. I don't think the new system it is any louder at low RPM's but sure has a nice tone to it. Prior to the exhaust installation I changed the intake filter to the AFE.

I've currently got about 8,500 miles on my late 2004 F250 Lariet 4X4 Crew Cab with the stock flash. It's lifted 4" and has 35" Toyo's on 18" wheels. We run the A/C here in Las Vegas all of the time and 70 MPH thru town is normal. Freeway speeds are generally between 75-85 lest you look silly getting passed by a Chevy S-10. At best, so far, I'm getting about 14.8 mpg on the freeway and about 1-2 MPG less in town. I'm sure the big tires don't help my fuel economy. Considering the size and power of this beast and that it's not quite broken in yet I'm not complaining. I'll probably find myself adding a Superchip or Predator flash soon hoping for a bit more. More is Goooood.

If you change out the exhaust system, make sure there is clearance between the downpipe and the heat shielding of the firewall. Mine is touching and I get a buzz sound from it at about 1,000 RPM. Hopefully not a big deal to fix but my friend had it too.

 

Really appreciate all your comments! Still not really sure of what exhaust i will go with. Leaning towards the Banks system because i have beentold they put alot of research into all they products before being released. I will be going with the 3.5" dp because of the clearance problems and will retain the cat,don't what any warrant issues. Not planning any type of programmer, just trying to lower egt's. I pull a 33' toyhauler 5er an see 1300 degrees pulling the hills into Oregon. Hopefully the new exhaust will help lower these tempertures. Will also be going with the new afe pro 7 for the intake. Thanks again for all your replies!

 

You might want to check with your service manager mine told me turbo back voids the warranty he said cat back no problem.

 

TN is right...
but even tho your svc writer/mgr says fine...
Ford does the warranty... not the dealer...

and, FYI, the air filter will void a warranty before and exhaust system :-)

 

JD
Is that just the open element air filter i.e. cold air box or does it include free flowing aftermarket air filter in stock box.

 

Seems to me after I read the warranty terms that almost anything that you do to your truck be it lift, larger tires, high performance air filter, performance programming and/or exhaust could void your warranty (by the small print of the warranty terms). As I work for a truck dealership and sell very expensive diesel semi trucks I can appreciate somewhat where the OEM is coming from. I would like to believe that I'm big enough to accept responsibility for problems I create by making these changes. As an example, I would expect that the manufacturer to warranty my failed air conditioning even though my tires are no longer stock if the problem is not related to my modifications. If the transmission fails because I fueled the truck beyond it's design, then it's my baby. If and when you have problems it matters a great deal which dealership you take your truck to and their attitude towards your problems. Some can be more willing to work with you than others.

I agree about the air filter being more likely to void your warranty. If the system fails and "dusts" your engine and the dealer can show that the air filter system was the cause, they will likely deny the claim. In my mind it wouldn't matter if it was a pricey K&N or AFE system or a cheap or improperly installed filter from the quick lube. Generally the cause of a major failure especially in the drive train can be determined quite easily. I don't worry to much about the what the lawyers dream up in the warranty agreement. They are just doing their part to make sure they have an out. Most dealerships just want to do a good job and make an honest profit.

 

I talked to the dealership where i purchased the truck. Service rep and head diesel tech said that as long as the cat stayed put there shouldn't be any warranty problems. I know that the intake filter change would void the warranty. Before visiting the dealer i would reinstall stock unit. Would like to hear from anyone as to how much lower egt's are with the change to the 4" turbo back exhaust system while towing.

 

I too would like to thank everyone for all the comments. I think I'll go with the 4" turbo back and retain the CAT. Just waiting on which one can get the best deal on. My even get a local exhaust with this muffler called Aeroturbine it is said to really lower the EGT by assisting with pulling the flow of exhaust.

 

just had the banks six gun bundel installed 4 weeks ago on mine run's pretty good not to much loader then stock untill you get on it then it sounds like a old hot rod what i had hope for was more like a big rig sound

 

like most have posted...
it depends on a lot of variables...

your dealer, any problems that may come up later that can be blamed on the change you did, etc... etc...

I mean if you changed your own filter with the stock one and didn't seal it properly... that's a reason to void turbo warranty if problems later....
(and that's a REAL possibilty with the ludicrous design of that canister !!!)