It is an insert that is used most of the time, and I think it helps a lot. It reduced the wheel hop I had a tremendous amount. I am going to fill the back mount pretty soon and recheck the front.

The front mount is easy enough, just some bolts to undo and redo.

warmonger

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black