I have a 1998 4x4 xlt and i wanna cut off the cats. it's cat back exaust (i know.. its dumb) but i wanna just cut the cats off and replace with clamped straight pipe.

I need to know which to cut off, and if it will leak after i clamp it?
I just dont know what to do really.. ideas??

 

I think that it wont leak.. but im not sure... should i take all 4 off?

 

i'd take off the 2 rear cats and replace the front 2 with high flows.

 

hmm thats cool.. i figured that id keep the front.. so if i take off the back do i just saw them off.. and clamp a new pipe on.??? wont it leak???

 

just cut them off and place pipe accross the gap and as long as you clamp the pipe on properly then you should be alright without leaks.

 

hmm good deal... well what will happen if i throw a light? will the computer try to adjust and mess up the gas to air ratio?

 

if your just taking off the rear cats it wont have a cel. if you took off all 4 without at least 2 high flows then it would throw a cel and mess with the air/fuel ratio.

 

cool.. what if i take the 2 back off now, but i dont put the front high flows on yet.... i dont have the $ to spare yet...

 

would that throw the cel?

 

it shouldnt. almost everybody here at least takes off the rear cats without getting a cel. you should be good.

 

wo0t so what will taking off theese 2 cats do for my truck? sound better? perform better??

 

should sound and perform better.

 

dope! thx bro.. you helped a lot

 

no problem. its what we're here for.

 

You may get a CEL a couple thousand miles later, then again you may not. On my '04 truck, my rear cats are not at all monitored, so I cut mine and clamped in flanged straight pipe. Gained a good sound out of it and economy went up .1mpg. As long as you tighten the s**t out of the clamps you wont leak exhaust or water.