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  #1  
Old 01-31-2010, 10:17 PM
FireFighter27 FireFighter27 is offline
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Default 2003 4.0 v-6

So I have an '03 4.0 V-6 with stock everything except the muffler back. I have a FLOWMASTER 40 on it but how do I get more sound out of it? Can I remove 1 of the 2 CATS on it?
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2003 Ford Ranger XLT FX4 Supercab
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Hood mount antenna
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  #2  
Old 02-01-2010, 08:30 PM
cwc ranger cwc ranger is offline
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you could but then you would run into O2 sensors going nuts cause they are on the cats, i put a cold air intake in my 4.0 and my friends ask what i have fore exhaust but i got a flomaster 40 and thats it after the cat and its pretty loud
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  #3  
Old 02-01-2010, 08:45 PM
FireFighter27 FireFighter27 is offline
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so your saying that if i put in a cold air intake into the truck it will give it better performance?
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2003 Ford Ranger XLT FX4 Supercab
Flowmaster 40 with 2.5" pipe
Back Rack
Cobra CB Radio
Bearcat Fire Scanner
Hood mount antenna
Delta Tool Box
Dual shoty CB whips
WAAG Grille Guard
31" BFGOODRICH ALL-TERRAIN T/A KO
Front Fog Lights
Rear Work Lights
Tailgate Reflectors
WHELEN EDGE lightbar
WHELEN LIN 3 Gille Lights
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  #4  
Old 02-02-2010, 12:07 AM
stephen stephen is offline
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i want to put a KandN cold air intake in my 3.0 eventually. this may sound weird but i read somewhere (dont remember where) that 3.0's already have a cold air intake in them? does anyone know if this is true? and can i really expect a respectable amount of performance gain of of it/is it worth the money.

oh and im getting a flowmaster next week. i was planning on the 40 but might go with the super 44 cause its a little louder.
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  #5  
Old 02-02-2010, 12:40 AM
bigcountry bigcountry is offline
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Quote:
Originally Posted by stephen View Post
i want to put a KandN cold air intake in my 3.0 eventually. this may sound weird but i read somewhere (dont remember where) that 3.0's already have a cold air intake in them? does anyone know if this is true? and can i really expect a respectable amount of performance gain of of it/is it worth the money.

oh and im getting a flowmaster next week. i was planning on the 40 but might go with the super 44 cause its a little louder.
ok 3.0s already have CAI stock no need for a K&N intake you wont see anything from it just sound. they arent worth the money and time it takes than what it will give you. even if you spent hundreds of dollars on exhaust and CAI intake you might only see a 1hp difference and prolly nothin on the mpg side of it. i mean if you want to spend 300 bucks on a CAI you could just send me that money and i will promise you 15hp gains and 5mpg better gas mileage
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General Geroge S Patton
2007 3.0
automatic trans, 4.10s with L/S
ported and polished TB
4brand new speakers with inslation in doors
smoked tail lights
20%tint on driver and passenger windows
5% tint on back window
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  #6  
Old 02-02-2010, 01:37 PM
stephen stephen is offline
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Quote:
Originally Posted by bigcountry View Post
ok 3.0s already have CAI stock no need for a K&N intake you wont see anything from it just sound. they arent worth the money and time it takes than what it will give you. even if you spent hundreds of dollars on exhaust and CAI intake you might only see a 1hp difference and prolly nothin on the mpg side of it. i mean if you want to spend 300 bucks on a CAI you could just send me that money and i will promise you 15hp gains and 5mpg better gas mileage
well yeah. like i said i remember reading that before and wasnt positive. im getting a flowmaster for the sound not the gains. what would you do with 300$ to get that kind of gain out of it?
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  #7  
Old 02-02-2010, 02:12 PM
bigcountry bigcountry is offline
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Quote:
Originally Posted by stephen View Post
well yeah. like i said i remember reading that before and wasnt positive. im getting a flowmaster for the sound not the gains. what would you do with 300$ to get that kind of gain out of it?
new roller rockers about 1.7:1 rockers and that will give you about a 10 to 15hp increase not sure bout the mpg part but that will give you more power and help the motor rev faster and get up to speed quicker. and also a cam for about 270 bucks and that will also help
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Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity."
General Geroge S Patton
2007 3.0
automatic trans, 4.10s with L/S
ported and polished TB
4brand new speakers with inslation in doors
smoked tail lights
20%tint on driver and passenger windows
5% tint on back window
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  #8  
Old 02-02-2010, 02:32 PM
TrePaul86 TrePaul86 is offline
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I removed one of the 2 cats under my truck with a straight through 2.5in tube and welded in an O2 bung for the sensor. That opened up my throttle response, a few mpg's and some sound for all around $30 for the bent tube to take the CAT's place.

I'm also running a SI/SI flow40 2.5" turned down at the muff. When I put the Super44 SI/DO 2.5" on I'll let people know the differences between the muffs.
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your like a guru.... like a little ranger boodah... covered in hair and knowlege
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  #9  
Old 02-02-2010, 07:53 PM
FireFighter27 FireFighter27 is offline
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what year is your truck tre? looks like an 03 but not to sure. amd which cat did you remove, the closest to the headers or closest to the muffler?
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2003 Ford Ranger XLT FX4 Supercab
Flowmaster 40 with 2.5" pipe
Back Rack
Cobra CB Radio
Bearcat Fire Scanner
Hood mount antenna
Delta Tool Box
Dual shoty CB whips
WAAG Grille Guard
31" BFGOODRICH ALL-TERRAIN T/A KO
Front Fog Lights
Rear Work Lights
Tailgate Reflectors
WHELEN EDGE lightbar
WHELEN LIN 3 Gille Lights
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  #10  
Old 02-02-2010, 08:33 PM
TrePaul86 TrePaul86 is offline
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Here's my pics:







I cut off the last cat in the system, the one closest to the muffler and welded in a straight 2.5" pipe with an "S" bend in it... Also drilled out a hole for the o2 and welded on a bung for the o2...

My truck is an 01... But only parts of it are still 01 lol
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FXEdgeplorer Level II
Part 01-03
Part 06

Geared Locked Bright Loud

Quote:
Originally Posted by Carl
your like a guru.... like a little ranger boodah... covered in hair and knowlege
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  #11  
Old 02-02-2010, 09:27 PM
FireFighter27 FireFighter27 is offline
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haha lol whats a bung how does that affect the o2 sensor? does removing the last CAT still allow you to pass emissions?
__________________
2003 Ford Ranger XLT FX4 Supercab
Flowmaster 40 with 2.5" pipe
Back Rack
Cobra CB Radio
Bearcat Fire Scanner
Hood mount antenna
Delta Tool Box
Dual shoty CB whips
WAAG Grille Guard
31" BFGOODRICH ALL-TERRAIN T/A KO
Front Fog Lights
Rear Work Lights
Tailgate Reflectors
WHELEN EDGE lightbar
WHELEN LIN 3 Gille Lights
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  #12  
Old 02-02-2010, 09:42 PM
bigcountry bigcountry is offline
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the BUNG is where the 02 sensor goes into the pipe before and after the cat and correct me if im wrong but the last cat the real one you have 2 one is a precat and the other is the auctual one
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Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity."
General Geroge S Patton
2007 3.0
automatic trans, 4.10s with L/S
ported and polished TB
4brand new speakers with inslation in doors
smoked tail lights
20%tint on driver and passenger windows
5% tint on back window
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  #13  
Old 02-02-2010, 09:44 PM
FireFighter27 FireFighter27 is offline
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Posts: 47
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does removing that last cat increase sound and allow for a pass on emissions?
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2003 Ford Ranger XLT FX4 Supercab
Flowmaster 40 with 2.5" pipe
Back Rack
Cobra CB Radio
Bearcat Fire Scanner
Hood mount antenna
Delta Tool Box
Dual shoty CB whips
WAAG Grille Guard
31" BFGOODRICH ALL-TERRAIN T/A KO
Front Fog Lights
Rear Work Lights
Tailgate Reflectors
WHELEN EDGE lightbar
WHELEN LIN 3 Gille Lights
Reply With Quote
  #14  
Old 02-02-2010, 09:48 PM
bigcountry bigcountry is offline
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not sure about the emissions part but it wiould sound different and it would increase sound because you would be opening up the system
__________________
Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity."
General Geroge S Patton
2007 3.0
automatic trans, 4.10s with L/S
ported and polished TB
4brand new speakers with inslation in doors
smoked tail lights
20%tint on driver and passenger windows
5% tint on back window
Reply With Quote
  #15  
Old 02-02-2010, 09:58 PM
FireFighter27 FireFighter27 is offline
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Posts: 47
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so remove the second cat, put a filler pipe on and bung it?
__________________
2003 Ford Ranger XLT FX4 Supercab
Flowmaster 40 with 2.5" pipe
Back Rack
Cobra CB Radio
Bearcat Fire Scanner
Hood mount antenna
Delta Tool Box
Dual shoty CB whips
WAAG Grille Guard
31" BFGOODRICH ALL-TERRAIN T/A KO
Front Fog Lights
Rear Work Lights
Tailgate Reflectors
WHELEN EDGE lightbar
WHELEN LIN 3 Gille Lights
Reply With Quote
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