spend 60 bucks and get it to a dyno .
it's a good idea to get some kind of baseline .
i got a big lift from the 3 " cat back (no cat) prolly around 35 hp .. adding 3" elbow and 3" no pre-cat downpipe was "more" icing on the cake .
using :
elect fan
no a/c
no cat
frees a little more juice
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