what size high flow cat should i get and what size cutout should i get. also wheres the best place to place it.

ok heres the idea i have. i already have a 3 inch magnaflow cb. i want to put the carsound/magnaflow hihg flow cat on. i have a single cat 95 lt1. i also want to add a cutout while im down there. what size cutout and highflwo cat should i get? i think teht stock cat is 2.5" but i dont knwo the size of the y pipe to go in the cat. i want to also add a borla y pipe but i posted a thread and someone said to not waste my money. but anyway back on subject i was thinking of getting the 3" cat and cutout. would that fit right with my catback, cutout and y pipe going to the cat? where should i put my cutout i was thinkgin b4 the cat. let me knwo asap. i can get the cat for about 50 shipped and two cutouts for 50 or so 3 inchers. the y pipe i found a borla t-304 stianlless for 160+ shipping what do you gusy think thanks!

 

I know the cutout needs to be a 3 inch one. I mounted mne right behind the cat, but most people put it just before the rear axle. Hope that helps.