Any advantage to the 'Superior Shift Kit'? I'm just being curious jorge....

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Regards,
Ian White

1995 E300 Diesel w124 OM606
2014 E550 w212 M278 biturbo

2001 BMW 740i E38 M62 (past)
1981 300SD w126 OM617 (past)

The shift kit replaces a few springs in the valve body and usually offers similar results with regard to improving the flare problems.

However, it's a much bigger job to deal with the valve body rather then just the K1 spring.