Anyone remove their smog equipment and cats and install headers?

My truck is registered in a Non-Smog City and im wondering what i can remove and add that wont mess up the computer when the cats are removed. Or do i need to keep them in for back pressure needs?

Also, what brand of headers fit the best and work the best on the F-150 4.6 . Are they expensive?

Thanks for the help !!!!

 

I have been wondering the same thing about the CATS! CATs are the Devil!!!

 

You need to keep your cats to be legal but if you chose to break the law you will need to defeat the rear set of O2 sensors to prevent the check engine light from coming on. Search for MIL eliminators. Or you could stick some black electrical tape over the light on your dash. Backpressure is not an issue here.

 

i have a 1990 f150 4x4 lariat and i put a jucied up 302 in it with headers and 40 series flowmasters i just drilled a hole in my header near the collector and welded it in and my truck runs fine

 

does anyone sell a "off road y-pipe" of the sorts, that is a direct bolt on to remove the cats? or are you stuck with having a shop bend and weld you up some custom pipes?

I would like to remove the cats as well (live in Nebraska, no smog checks at all here) but would rather do it myself then have to take it somewhere and pay up the *** to have something custom built.

 

Still Illegal.

 

Hey SC Boy, did you o with tin 40 Flowmasters on the 302? I just bought 2 40 series because im going to dual pipes from the headers and was wondering how loud the 40's will make it. do you get alot of resinating noise on the highway?


Thanks Much, Ken

 

Yep sure is, but isn't as bad as my 12.5:1 CR carbed 347 mustang running around with open headers. lol.

 

LOL, Good reply Hibs, i liked that. I think NORM needs to try-out for his local Police Force !!!. Then he can advise people about the law who actually give a dam.



CHOW

 

Just pointing out a fact. I have no problem if you choose to be stupid but some people think it is actually legal. Just clarifying for those that may make that mistake. Ignorance and stupidity are two different things. Removing or gutting cats or emmissions equipment is illegal unless replaced by proper stock or aftermarket replacements. Magnaflow hi flow cats can be had for as low as 60 bucks. 120 is a lot less than the potential fines. Just because your local inspector choses not to look underneath does not make it legal. That is my point. It is your truck and you can do what you want. As long as you know it is illegal then the onus is on you. You live with your choices and face the potential consequences.

 

I agree ask my buddy a couple of Ponies are not worth a $500+ ticket in Las Vegas and Double Insurance for 3 years.