i searched over some threads on this topic but i have to ask some questions..
im looking into some exhaust mods, considered full system however would much rather spend less.

i know headers are the best way to get more out of what i do , so does anybody know where to find headers for the 3.8 that do NOT delete the catalytic converter, in canada its required?

im also considering magnaflow mufflers, with dual resonated tips.
would the resonated tips and stock resonator be enough to dampen the noise at cruising speeds, or would a swap for a mbrp res be benificial?

will any of these combitations give me a power boost without the headers?
stock headers + stock res + magnaflow mufflers + res tips
or
stock headers + mbrp res + magnaflow mufflers + res tips
or
standard tips?
or
headers + mbrp res + magnaflow mufflers + which for tips?

thanks for any advice.