My new truck i just got came with a single out to duals flowmaster set up.it has a nice rumble but its to mellow for me.so i made an apt with my local shop to make me a true dual strait pipe set up.i thought this truck had four cats like the older f150's but after looking at mine i see that it only has two.but the o2 sensers are still upstream from the cats with no down stream o2 sensers.can i remove the cats or will it cause a cel light? thanks

 

wondering this on my 98 ford f150,i got a apt for true duals wondering about the cats though,well im gonna go dual into dual x pipe muffler and out dual

 

Removing the cats is Illegal in all 50 states...I doubt the muffler shop will do this for you.

 

Yeah its illeagle.but so arnt alot of other things and people still do them.and the shop will do it the owner and i no each other well.

 

I was going to post a long message with all the issues, legal and otherwise, that this could create, but I'm just going to shorten it a touch.

Ain't narcissism a wonderful thing?

 

i was thinking about doing it. but i do like passing inspection. i no once i do in june im just taking my glass pack right out. and dumping it straight out the side. i want it louder!

 

I cut my rear cats off I had four and went to two of them and it made a big diff in sound and power

 

Slice the back 2 cats off and don't sweat the legality... You will still have the 2 front cats and that won't throw any codes.



It should look like this when it's done and both 02 sensors will be before and immediately after your newly single cat

 

This is what I plan on doing. Cut the rear cats off, true duals into glasspacks and full pipes out the back stopping just short of the rear bumper.

Bonus: Sell the rear cats to a scrap/recycle yard, I hear they're worth some money.

 

See my truck only has two.cats . and there isnt any down stream o2 sensers