Has anyone found trick how to adjust tilt on RS non-electric leather seats seat base? I would like to get front of the seat little higher but there is no adjustment

not sure but my VRS has a squeaky seat base (really annoying creak when going around corners) and it going in to have the seatbase replaced under warranty in a couple of weeks time

I don't think you can on the non-electric one unfortunately.

Longer front bolts and spacers?

They dont tilt Im afraid. Raising the height a little might help.

Longer front bolts and spacers?

Old school adjustment.

Lowering the seat downwards with side handle will get the front of the seat the most up. 

Old school adjustment.

But it works!

Spacers.. Just what I was thinking about. I did it on -72 454 Camaro last time so little more resent experience would be appreciated. One would also argue there has not been any technical development since -72 if old schools mod work Then again.. they work forever