Originally Posted by pacwest

I am being careful. I'm just throwing it out here that reading the specs on a seat and plonking it into any car won't work per se. Sure he's in the RS turbo section but it's my experience with the internet it's wise to ask the direct question rather than assume. I am no expert on the RST but I was essentially asking if it was an S1 or an S2 - if there is any slight difference in the seat rails, tunnel etc it will have an effect.

This has been an expensive lesson for me since I bought seats for my Merkur that were maybe an inch too wide. The 1985 Merkur tunnel is a bit different than most Sierra tunnels. I bought a seat for my cyclist legs but it was no match for my car. I should have bought a little bit tighter seat.

Find the happy medium between car fitment and ass/shoulder fitment. Just trying to help.