The m62 is definitely a good choice if you can afford anything better. A good way to look at it is the m62 is very old tec . It’s a bigger supercharger then the TVS900 but Produces less power and more heat . The m62 is just not as efficient as the TVS900. Then there is also the problem of not having a kit available ( because the after market deemed it not worth it for the gains) so you’ll need to spend weeks (if doing a nice job) to build the necessary Parts. There is talk about someone building a kit or parts of a kit but at this time it’s just talk . The m62 is great for someone with time and needing to do it on the cheap .I finally found a German guy that had put a Cobalt/Saturn M62 on a R53, GP1 actually, and got a good tune with it. He posted up up a video and the power gains, 311 ps, are quite good when one considers how cheap they can now be purchased here in the US. Cheap enough that within the last week five more have been shipped over the Atlantic to join four that I sent over a couple months ago. In a couple of months there should be more dyno data out there with both stock and BVH heads.
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