Hi Crazy,
It would be best to leave the smog pump attached and functional. It will only gain you 1-2 h.p. and without the air going into your cats when your engine is cold the cats will plug up faster than normal. if you had an off road h-pipe it wouldn't be a problem.
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Good luck!
B.R.
L.X. 5.0 coupe
Cruise control,power mirrors,...and Thats it!
( except for the supercharger )
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