Thanks for the advice about all of the parts. That's why I specifically wanted to get a kit, so it would have EVERYTHING. They state on their site that the only thing it doesn't come with is oil and and oil filter.
Based on your install do you see anything that's missing from their list that you found mandatory or even helpful?
'98 Mustang GT
H&R Sport Springs, Tokico HP's, MM C/C's, MagnaFlow Cat-Back, Tri-Ax, Spec Stage 1, Ford Racing Flywheel, DiabloSport Tuner, K&N