They can easily be removed and will not void your factory warranty
The design showcased trapezoidal blocks
Deflection Pulley for A/C Compressor Belt for M3 (2008-2013)
This product is ideal for drivers who want to enjoy the benefits of a short and tight shifting feel but also want the option for a slightly longer
Mercedes-Benz Main Bearing Set (58.00 mm, Standard) | 1986-1999 Manufacturer:Glyco They can easily be removedMain Bearing Set (58. 00 mm, Standard) for C280 (1994 1997), C36 AMG (1995 1997), E300 (1995 1999), E320 (1994 1997), S320 (1994 1999), S350 (1994 1995), SL320 (1994 1997), 190E (1987 1993), 260E (1987 1989), 300CE (1988 1993), 300D (1987), 300E (1986 1993), 300SD (1992 1993), 300SDL (1986 1987), 300SE (1988 1993), 300SEL (1988 1991), 300SL (1990 1993), 300TD (1987), 300TE (1988 1993), 350SD (1991), 350SDL (1990 1991)