Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: F250 Catalytic Converter Removal?

  1. #1
    Senior Member Lariat's Avatar
    Join Date
    Aug 2008
    Location
    West Palm Beach, Florida
    Posts
    85

    F250 Catalytic Converter Removal?

    I have got a 03 F250 4WD w/V-10 and would like to remove the cat from the exhaust and put a straight pipe in its place. Will I have any vehicle computer issues? Anybody have a good manufacturer for the straight pipe?

    Lariat

  2. #2
    Senior Member
    Join Date
    Mar 2007
    Location
    Pennsyltucky
    Posts
    1,143
    Yeah your light will pop on alomst immediatly. The newer style cats don't really hurt performance as much as the old ones. you probably won't feel a difference at all.
    Joe
    89 K2500 Chevy, Wee-Oh-five 294K miles
    1962 Scout 80 parts I guess
    1966 Scout 800 resto job
    2005 Chevy 2500HD Short cab long box DURAMAX
    1996 P30, 6.5 NA Mac Mobile
    whole lot of buicks

  3. #3
    Senior Member Lariat's Avatar
    Join Date
    Aug 2008
    Location
    West Palm Beach, Florida
    Posts
    85
    Any way to trick it? What is there a sensor mounted to the Cat?

  4. #4
    Senior Member 87c10slammer's Avatar
    Join Date
    Mar 2008
    Location
    levittown pa
    Posts
    3,221
    its not on the cat. but it is inline withthe exhuast. they sell o2 sensor similators to trcik the computer but have never used one. dont have a vehicle new enought that i wanna do it to. lol. your best bet is to let it be just do staight pipes after the cats. they will accually do more good then bad. just disconnect your exhuast after the cats and see what it sounds like.

  5. #5
    Senior Member
    75K30's Avatar
    Join Date
    Jul 2006
    Posts
    3,690
    V-10's do not sound all that great with the muffler removed. I do not even like the sound of the flowmaster on a ford V-10.
    Your biggest restriction is in the exhaust crossover, and the tiny little stock manifolds.
    I have enjoyed the sounds of Borla's, and especially the round Ultra-Flo's from Dyno max.
    Dyno Max race bullets sound nice too.

  6. #6
    Senior Member Lariat's Avatar
    Join Date
    Aug 2008
    Location
    West Palm Beach, Florida
    Posts
    85
    Are the Borla's and the Ultra Flo's Cat-back exhausts? I am trying to release pressure to increase MPG.

  7. #7
    Senior Member 87c10slammer's Avatar
    Join Date
    Mar 2008
    Location
    levittown pa
    Posts
    3,221
    you can have one made at your locall exhuast shop. most of the time they are cheaper. i have saved 200 bucks just by bying a flomaster muffler and having them bend up some stainless pipe for me. then i cut and welded it myself

  8. #8
    Senior Member
    75K30's Avatar
    Join Date
    Jul 2006
    Posts
    3,690
    Your existing system flows fairly well, after the cat. You can add just a mufler, and weld in a new crossover. That little tiny crossover is a very restrictive component in your stock system.
    There are aftermarket X-overs available for the SD and Excursions.
    Just take a close look at the factory exhaust manifolds, and the pinched up factory x-over, and you will see.
    The size alone will be its own indication.
    The big names sell complete kits, but these are often pretty spendy, and while they look good, they can take many years to realize a savings in gas.
    But, yes the above manufacturers have cat back systems available for easy installations.

  9. #9
    Senior Member
    Join Date
    Mar 2007
    Location
    Pennsyltucky
    Posts
    1,143
    your mileage isn't going to increase by hacking the cats off. Your never going to get great mileage with that truck unless you go diesel.
    Joe
    89 K2500 Chevy, Wee-Oh-five 294K miles
    1962 Scout 80 parts I guess
    1966 Scout 800 resto job
    2005 Chevy 2500HD Short cab long box DURAMAX
    1996 P30, 6.5 NA Mac Mobile
    whole lot of buicks

  10. #10
    Senior Member gmctrucks's Avatar
    Join Date
    Nov 2006
    Location
    Houston,Texas
    Posts
    6,263
    Don't remove the cats if you do replace with free flowing cats Magna flow has some real good one's. I'm hugging a tree right now writing this letter im using my lap top. I love my tree she's so good im getting a little wood right now it's from a branch. LOL

Page 1 of 2 12 LastLast

Similar Threads

  1. catalytic converter for an 02 Avanlanche
    By Airforce wrench in forum Chevy Truck Forum
    Replies: 9
    Last Post: 06-01-2008, 05:43 PM
  2. Torque converter removal
    By steven1213 in forum Chevy Truck Forum
    Replies: 3
    Last Post: 03-01-2008, 03:53 PM
  3. Catalytic Converter
    By PickUpGirl787 in forum Chevy Truck Forum
    Replies: 6
    Last Post: 01-10-2008, 08:57 PM
  4. empty catalytic converter = worst gas milage???
    By mochester in forum Toyota Truck Forum
    Replies: 5
    Last Post: 08-04-2007, 08:15 PM
  5. california catalytic converter laws/punishments
    By mochester in forum General Truck Forum
    Replies: 10
    Last Post: 07-25-2006, 08:38 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •