I'm going to be installing b&b test pipes shortly. Main reason is i dropped down to a 2.35" pulley and don't want to run the risk of burning them up. Guys that have done this, are you able to run a few more degrees of timing at WOT than WITH cats? I'm currently at 16* at WOT in the upper rpms with a 2.55" on 91/93 octane (which seems pretty normal). I know i can always trial and error this, but i'd figured i'd ask first. thanks