had anyone ever had any running problems with the cat off the car and just a 3" staright pipe, any check engine lights and car running lean?

 

some have, some havent. depends on tune/defouler and a variety of other factors.

There is a lot of info on this on EvoM, do some searching (ie: try it for the first time) and you'll be rewarded with bacon and info!

 

im running the speed circuit test pipe and i poped a CEL light in freezing cold weather while rippin it. went away shortly after. 3 months later, still no CEL or SES light. solid peice.

 

hmmmm bacon, that is worth using the search feature! But yes most of them have the CEL mine did.

 

stock?

 

Stop with these threads. Search!