Map tweak.?
 

Hi, ive got an Impreza sti 2004 with fmic, alcatek, gt spec headers, md321t and few months back was mapped for a cobra 3 inch turbo back system, if I change to a cobra track day middle and rear box would the car require a map tweak or would it be fine.? Cheers

Best getting the afr checked doubt it would but best to make sure.