Whats up all ya all I got i question im putting 3 inch exhaust on my car and i was wondering if i need a high flow cat becasue of my sensors????? PLZ Respond soon spring is almost here thanks

well....see if you want to go for high end or low end.....if you want to run for high end then i think u sure run 3" strght pipe with a 4" exhaust....but if you want to go for low end then...go for 3in down pipe with a high flow cat...thats only my setup only cause i dont know what you have in her.