im chasing 270/280 rwkw for Bf xrt for my first tune. Will I need to upgrade my cat from standard?

you won't have to , but it will make power easier with one

thanks mate! im also wondering if I have it done before the tune will it affect my car? >

Edited October 2, 200917 yr by big fella

Yes it will. Not advisable if it's not tuned. You run the risk of leaning out the AFR which may end in tears. Best wait and have it fitted before it's tuned.

is it just me or does the post above contradict itself

Maybe. Depends how you apply the logic.

To fit it and then drive around untuned would not be good.

To fit it 10 or 15 minutes before it is strapped to the dyno is still fitting it before it is tuned.

Is it really rocket science?

now that makes more sense

my apologies I can't brain today I have the dumb

All is forgiven. lol

thanks for the info fellas!

you can fit it before hand if needs be, though id be driving it around like a grandma until its tuned.