there's "two versions" one is the 86.5-88 pipe, and it's like $40 or so.
the other is the 89-92 pipe, and it runs about $30, if i remember right.
here's a secret. the pipes are identical. so you know which one to get.
hopefully Jeff Lange will pop in here, as he has the P/N's for them. i believe that i got that right.
-shaeff