Make sure they are long tube headers and a shorty x pipe. Full exhaust plus 93 octane tune should net close to 25 rwhp.
I have Magnapacks and I really like them, however I have a catted midpipe. The general wisdom is that if you're using a catted midpipe, get the Magnapacks; if you're using an offroad midpipe, get the regular Magnaflows. As for which longtubes will fit, I've heard that SLP fits with no issues, and the Bassani mid-lengths fit as well.
My friend runs BBK on his auto. Scratch that. Bassani.I just found out that the BBK Headers will not fit my car because i have an auto trans is there any brands that any knows of that fits their car with auto trans