This is where I purchased my Mac header system for my '93 T/A, and I gotta'
tell ya', it made one hell of a difference! I also installed the Mac off
road pipe which goes where the Cat "should" go. The car wasn't as loud as I
thought it'd be with these parts(thank God) but sounds GREAT with my
Flowmaster cat back system. Set yourself a couple of nice days aside to do
it in, and buy some good LT1 header gaskets, as the ones that come with the
headers suck. Bolts, washers, brackets are all included. They really are
very nice headers. I also ordered several other things from this place.
Their prices are a little higher on some of their things, but they had the
best price I'd found on the headers anywhere. Good Luck. I hope this helps.
'93 Trans Am LT1. Headers. No Cat. 3.73s. Thermomaster chip. K&N cold air.