Originally Posted by dubcac
It makes much more of a difference on the GSR, due to the single runner vs dual runner design. On an LS, it'd be hard to feel much of a difference.
True, and it also shifts the powerband further back into the mid-high end where the LS is lacking. I would stay away from it unless you have some decent cams and a strengthened bottom end to rev higher and take advantage of the extended powerband.