As you can see the fitment is horrible. After tightening the bolts to the header, the y pipe then pressed against the front driveshaft. Horrible fitment! LT's and ORY would be alot easier to install with truck on jack stands.

heres a picture of the Y after prying it against the tranny crossmember, what a bitch freeing it from driveshaft. It would probably fit alot better in 2WD.