Would it be unwise to first get a cat-back system, then upgrade exhaust manifolds to headers? Or would that make installing headers more difficult if i already had an aftermarket exhaust installed?
It wouldn't make a difference in the install difficulty.
2004 Impala LS - got some mods sold!!!
2009 Subaru Impreza WRX STI
NAIOA moderator Still Imp'n, just in a different Imp.