de-cat

im de cating my micra saturday should i just cut out the second cat or should i cut out the cat near the manifold as well as i dnt realy now wot to do as its got two cats ive de cated lots of cars in the parst just dnt know if the frount cat is more inportent
 
if i cut out the front cat aswell will this afect the running of the car?andwill i notice a difrence in power if i do the front aswell as the back thanx again
 
as primal said im running janspeed manifold janspeed decat and then custom cat back to cobra back box so i have no cats and runs like a dream mate
 
front makes the most performance difference (it being removed)...but as a result sometimes raises your emissions come mot time.
 
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