question, i have a 99 si and im wondering if i should gut my cat. i will be installing a trm cat back saturday. my only other mod is an intake. is it worth the work? will i have o2 sensor issues? im not trying to make a big difference in performance, however when i install the header it seems i would have better flow w/a hollow cat. any help would be great.

thanx guys (and gurlz),

happy racing,

jay