It has 4 cats for a reason: to meet certain emissions standards. Can the truck function without the cats? Yes. Pass emissions? No.
x2 buddy our cats are different from all the other makes, thats why we need 4, and they didnt just throw 4 on there cuz they felt like it, they have a purpose, lucky for me im not in a emissions place so i cut all 4 and got 2 hi flows!!!
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True Dual 10 Series Flowmaster, H Pipe, Maggie Hi Flows (94106) http://www.youtube.com/watch?v=nezTBIV8bOA
Selling (97 - 03 4x2 F150):
LIFT KITS ARE ALL BRAND NEW STILL IN BOX:
7.5" Fabtech complete lift, 2" coil spacer
2x12" tan carpet Subwoofer box for 01-03 Extended Cab (not supercrew)
PM for info/pics
I thought the hi-flows pass emissions to, unless you're in commiefornia
your right, if they are C.A.R.B certified or what ever which mine are
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[IMG]Please re-size sig image to 500x100[/IMG]
Signature Thanks To DarrenWS6
True Dual 10 Series Flowmaster, H Pipe, Maggie Hi Flows (94106) http://www.youtube.com/watch?v=nezTBIV8bOA
x2 buddy our cats are different from all the other makes, thats why we need 4, and they didnt just throw 4 on there cuz they felt like it, they have a purpose, lucky for me im not in a emissions place so i cut all 4 and got 2 hi flows!!!
Actually your 2 high flows do the exact same function as Ford's factory 4 cats. The late model F150s have only 2 cats. It is simply reduction and oxidation. You can do both in the same cat, or have separate cats for each action.
NO high flow cats are legal in California on an F150, period. If they were, i would've had them on years ago.
your right, if they are C.A.R.B certified or what ever which mine are
Actually, CARB stands for California Air Resources Board. It only applies to California. CARB certified cats are legal on certain vehicles, but those vehicles must first be cleared by the CARB for high flow cat use. The Ford F150 (any version) has not yet been certified.
ohh ok thanks for clearin that up i had heard that if they were CARB then they were legal in california, guess not, and to bad ford isnt certified for that huh why is that
Tuning the computer to know what exhaust diameter its running helps performance minimally. 2004 & 2005 trucks rear cats are not O2 monitored, and resonate all the sweet sound. I chopped my rears out and only running the pre-cats. No CEL, much better sound, rpms are in the same levels, no smell, still technically has cats.
Tuning the computer to know what exhaust diameter its running helps performance minimally. 2004 & 2005 trucks rear cats are not O2 monitored, and resonate all the sweet sound. I chopped my rears out and only running the pre-cats. No CEL, much better sound, rpms are in the same levels, no smell, still technically has cats.
Darren,
How do you pass emissions in PA? I want to replace my stock muffler with a Flowmaster or Magnaflow but I was gonna leave all four cats. I figured I would need them to pass PA. inspection. I am not looking to spend a ton of dough and the wife doen't like loud exhaust but I want to open it up a little. If I can pass inspection, I'll take off two cats and change the beast of a muffler that is currently under there. Just wondering.
How do you pass emissions in PA? I want to replace my stock muffler with a Flowmaster or Magnaflow but I was gonna leave all four cats. I figured I would need them to pass PA. inspection. I am not looking to spend a ton of dough and the wife doen't like loud exhaust but I want to open it up a little. If I can pass inspection, I'll take off two cats and change the beast of a muffler that is currently under there. Just wondering.
lol
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