v10 Excursion Remove cat
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Senior User
Joined: Nov 2009
Posts: 116
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v10 Excursion Remove cat
Ok so Im thinking about removing the cat and putting in a strait pipe. Im running an 03 Excursion 4x4 v10 6.8 4.30 Limited slip with 5star tuner CAI 3" Y-Pipe flowmaster 44's and 35" mudders. The tuner i have gives me the ability to disable rear o2 sensors. Im not worried about losing mpg (its an excursion not a prius lol) But if i gain mpg (without sacrificing power) im all for it. Anyone removed it yet and how did it turn out for yall?
Oh and we dont have emission tests around here.
Oh and we dont have emission tests around here.
Lead Driver
Joined: Mar 2013
Posts: 7,460
Likes: 85
From: Kent Station, WA
I remember reading about removing the cat with little benefit. I can say you will get more unburned fuel smell inside without. As far as the rear 02 I believe those are only on California emissions models. Sounds like you have all the mods up to par.
Logistics Pro
Joined: Jan 2007
Posts: 3,835
Likes: 106
From: Martinsburg, WV
All it does is make it stink like an 86 chrysler.... NO PERFORMANCE GAINS. All you get is the brohemian exhaust clatter... And before anyone suggests it, there is no such thing as a "hi flow" cat either, they are just underperforming cats. Have you replaced the t-pipe yet? That is a bigger choke point. And as stated above, non-cali, no rear 02. It's actually OBD-1 level programming in an OBD-II box.
Logistics Pro
Joined: Jan 2007
Posts: 3,835
Likes: 106
From: Martinsburg, WV
No, that's what an old Chrysler smelled like on the inside...lol
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