You are correct that the slots in gas-slotted brake rotors should be facing towards the front of the car; e.g. the inner slot should contact the pad first while the outer slot contacts it last.
It's the same principle associated with directional tread tires.
The tire tread pattern, similar to brake rotor slots, should follow the direction the wheel is rotating.
By the way, from whom did you purchase your Borla exhaust?
1999 SVT Contour, #2140 of 2760, Tropic Green - Medium Prairie Tan
Koni Sport struts; TSW Blade wheels; Nakamichi, a/d/s/, Boston Acoustics, Infinity I.C.E.
1989 Saleen Mustang, #89-0408, too many mods to list here
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