need to know

[40thmustanggt]

do i need 02ext on a 04 gt with off road xpipe??? please someone help me out so i can place my order

 

[bryan0]

Do you have stock/shorty headers or longtubes?

 

[SaleenGT2001]

they are not needed when just swapping mid pipes.

you need o2 sims unless yourcar has the rear o2's shut off.