Cat Back or Turbo Back?
Cargo Master
Joined: Jun 2003
Posts: 2,203
Likes: 0
From: Carlsbad, California
You don't really need to do either one. The truck performs fine stock and the gain per dollar spent doesn't really justify making the mods.
If you want to improve the performance more drastically, get one of the tuners like the Superchips Microtuner or the Predator.
If you must make an exhaust mod, I would consider doing just the Cat back and not the Turbo back or at least leave the Cat in if you do a turbo back. The Cat delete hasn't been shown to make that much of an improvement if any and is against Federal law to boot.
If you want to improve the performance more drastically, get one of the tuners like the Superchips Microtuner or the Predator.
If you must make an exhaust mod, I would consider doing just the Cat back and not the Turbo back or at least leave the Cat in if you do a turbo back. The Cat delete hasn't been shown to make that much of an improvement if any and is against Federal law to boot.
Elder User
Joined: May 2003
Posts: 833
Likes: 0
From: NW Montana
Originally Posted by superfast6.0
turbo back, with a muffler, u dont need all that back pressure
I would agree with Darylhunter that if you do change the exhaust stick with CAT back.
Senior User
Joined: Jun 2003
Posts: 326
Likes: 0
I went with the cat-back on my 03. I would rather ber safe than sorry and that is what my dealer told me. I keep reading that the turbo on the 6.0L requires a certain amount of back pressure, espicially when towing. I tow a 8000 lb TT and I use the Predator in the heavy tow mode and the truck runs awsome. The Cat-Back Hog Exhaust gets my vote.
EJ
EJ
Posting Guru
Joined: Jan 2004
Posts: 1,539
Likes: 1
From: Snohomish, Washington
Originally Posted by darylhunter
You don't really need to do either one. The truck performs fine stock and the gain per dollar spent doesn't really justify making the mods.
Cargo Master
Joined: Jun 2003
Posts: 2,203
Likes: 0
From: Carlsbad, California
Again, if the EGTs are too high pulling only 3000 lb, then there is something else wrong with the truck that needs to be looked at.
I've got an '03 with the massively restrictive down pipe and totally stock exhaust system. The highest EGT I ever recorded while pulling the trailer up 8%+ grades was something like 1173 F preturbo with no tuner installed.
I saw a high of 1243 F for just a couple seconds on the Tow Safe tune while pulling back on to the road from a turnout while on the way home from Big Bear. This was in 1st or 2nd gear with my foot nearly on the floor (lifted a tad to limit wheelspin). As soon as the truck was getting good traction I mashed it back down to the floor and the EGTs never topped more than about 1170 F.
Using the Economy tune on the last trip to Borrego Springs and back a couple weeks ago the max EGT was less than 1150 F.
This is with a 10,000 lb trailer. With a 3000 lb trailer there is just no way that the EGTs should be getting high enough to justify any exhaust system work IMO.
I've got an '03 with the massively restrictive down pipe and totally stock exhaust system. The highest EGT I ever recorded while pulling the trailer up 8%+ grades was something like 1173 F preturbo with no tuner installed.
I saw a high of 1243 F for just a couple seconds on the Tow Safe tune while pulling back on to the road from a turnout while on the way home from Big Bear. This was in 1st or 2nd gear with my foot nearly on the floor (lifted a tad to limit wheelspin). As soon as the truck was getting good traction I mashed it back down to the floor and the EGTs never topped more than about 1170 F.
Using the Economy tune on the last trip to Borrego Springs and back a couple weeks ago the max EGT was less than 1150 F.
This is with a 10,000 lb trailer. With a 3000 lb trailer there is just no way that the EGTs should be getting high enough to justify any exhaust system work IMO.
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Posting Guru
Joined: Jan 2004
Posts: 1,539
Likes: 1
From: Snohomish, Washington
Daryl,
I agree with you about the 3000 lb trailer but I think you are asking for trouble if you don't change the highly restrictive Muffler on the stock exhaust system. I think the rest of the exhaust system including the downpipe is not that big of a change but the muffler is definitely restrictive. I have done it all in steps and noticed a difference.
I agree with you about the 3000 lb trailer but I think you are asking for trouble if you don't change the highly restrictive Muffler on the stock exhaust system. I think the rest of the exhaust system including the downpipe is not that big of a change but the muffler is definitely restrictive. I have done it all in steps and noticed a difference.
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Joined: Jan 2003
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From: 3rd Rock
Originally Posted by PSD 60L Fx4
Whats wrong with MY truck? It stays unloaded but still bounces off the 1500 Degree mark...even with a 4 inch straight pipe 
Oh..wait... never mind.
Oh..wait... never mind.
Senior User
Joined: Mar 2004
Posts: 394
Likes: 0
From: s.f. bay area
Ok, for those of you who have done a CAT back or a muffler replacement, have you been able to see a reduction in EGT after the change? I am pushing 1225 on a fully stock truck pulling my trailer (8000lbs), and am looking to lower it.