What size hi flo cat for 2gnt???? Is it worth it?

[Eclipse96Ryder]

I have a greddy evo cat back and want a hi flo cat, i should get 2.5" right??? If anyone has this setup lemme know how it is

 

[FuriousEclipse]

i was wondering the same i am going to run new piping from cat back but unsure of the best pipe size and was wondering about a straight pipe in place of the cat, i don't have emissions tests here so i don't need toworry about that. My buddy had a jackson racing hi flow cat and he blew all the insides out, i hear a lot of vtecs doing this not sure of eclipse owners though.

 

[Dark_Racer]

2 1/4" is the best, its our stock size but just get a High Flo Racing cat. Going bigger you will lose back preasure and lose HP.