thinkin bout switchin out the cat and running a straight pipe but know ill get a engine light if i do this, what exactly would i need to prevent this, im eager i wanna do it this week but wanna be smart, please help, i hate seein that friggin yellow light.

 

You need an O2 simulator...and you can get them from pfyc.com, zzp.com, etc.

 

you might also find them local. i know our speed shop back home had them on the shelf.
honestly your better off with a hig flow cat. you wont notice a diffrence with or with out it if you have the hig flow. they are desined to flow so much better thent eh stock version, Then your legal also.

 

if you dont like the check engine light being on and you dont want to get the o2 simulator then get a piece of black electrical tape and cover the light...lol..jk jk...no go for the simulator if you get rid of the cat