The product itself is fantastic, much more responsive to acceleration, cornering and no wheel impact. I installed it on my 2011 G37S sedan and it's a bit short because it's 350z/g35 but it works fine. difficult, and Infiniti replaces the entire subframe when these bushings wear out. As a professional mechanic I did the job myself and with my knowledge, tools and access to a hoist it took me about 2 hours to install as the old bushing/bushing is so difficult. can also be removed with a pneumatic hammer and chisel.