Cat delete info.. - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 12-27-2011, 03:44 PM Thread Starter
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Cat delete info..

I've searched and searched with little to no luck, does a cat delete actually gain anything? Like lower egts, mpgs, hp.. anything? Everything i've found is concerning the legality of it and where i'm at, no one cares.. I've done chopped out the muffler and have the 6637. Thanks ahead of time tho.

Cody Ryan
03 f250 ccsb fx4 7.3
4" RC lift
35x12.50 federals on 20x12 rockstars
6637 intake, straight pipe
full RR w/ fuel bowl delete.
rebuild coming soon


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post #2 of 4 Old 12-27-2011, 04:02 PM
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Definately helps. If you ever seen inside one you can see how insanely restricting it is. I gained about 1.5 mpgs deleting mine. But you should just go with a 4" exhaust if your looking for a drastic decrease in EGT. Deleting/hollowing the cat will help a little but the small downpipe is what is restricting the turbo.

2001 F350 SRW CC 4WD LB
ZF6 w/ Southbend, 220k, DIY Intake, WW,NonEBPV Pedestal, CCV Mod, Gauges (Boost, Pyro), 2in Leveling Kit, 4" Straight MBRP, AIH Delete, 2-12" Kicker Comp's, Pioneer Amps
2001 F350 DRW EC 2WD (Rolled Over)
2000 F550 CC 2WD
Automatic, Jasper 4R100 w/Derale Pan & 6.0 Cooler, DIY Intake, AIH Delete, 4" MBRP,
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post #3 of 4 Old 12-27-2011, 04:16 PM Thread Starter
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Yeah I plan on doin either 4 or 5 inch but that'll be when funds allow. I can get the cat deleted for about 20 right now. Any pros or cons to the 5 inch over the 4?

Cody Ryan
03 f250 ccsb fx4 7.3
4" RC lift
35x12.50 federals on 20x12 rockstars
6637 intake, straight pipe
full RR w/ fuel bowl delete.
rebuild coming soon


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post #4 of 4 Old 12-27-2011, 04:23 PM
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5 is no gain over a 4" unless youre planning on going to 1000+ hp. And is also a lot louder and harder to install since its bigger and fits tighter. 4" has a nice rumble whether muffled or straight and drops your EGT something like 200+ degrees. Fairly cheap too.

2001 F350 SRW CC 4WD LB
ZF6 w/ Southbend, 220k, DIY Intake, WW,NonEBPV Pedestal, CCV Mod, Gauges (Boost, Pyro), 2in Leveling Kit, 4" Straight MBRP, AIH Delete, 2-12" Kicker Comp's, Pioneer Amps
2001 F350 DRW EC 2WD (Rolled Over)
2000 F550 CC 2WD
Automatic, Jasper 4R100 w/Derale Pan & 6.0 Cooler, DIY Intake, AIH Delete, 4" MBRP,
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