Hello. There are 4 stages if you want to install M4 carbon strut brace on F32 4 series.
Stage 1 M4 Support bearing reinforcement ring
Stage 2 M4 Alloy center strut brace + M4 support bearing
Stage 3 M4 Carbon (CFRP) strut front end
Stage 4 M4 Extension suspension cross brace + Diagonal strut
My 2014 428i (N26) already has Ohlins R&T MP00 suspension and M4 genuine 437M wheel + PSS 235 / 265 tire. Currently Stage 3 completed .. Enjoy !!
Here we go : Both Beinforcement ring and Guide support bearing need to be matched with production year of yours. from 2015 it's changed from M10 3 hole to M8 5 hole.
Stage 1 M4 Reinforcement ring for Guide support bearing
~ 2014 : used M10 x 3 hole
Reinforcement ring, left : 31302285700
Reinforcement ring, Right : 31302285701
Hex screw M10 6 EA : 07119904141
2015 ~ : used M8 x 5 hole
Reinforcement ring, left : 31302361991
Reinforcement ring, Right : 31302361992
Hex screw M8 10 EA : 31307855400
Stage 2 M4 Alloy center strut brace + M4 support bearing
~ 2014 : used M10 x 3 hole
Guide Support bearing 2EA : 3130284702
Alloy Strut brace (left steering) 1EA : 31122284855
2015 ~ : used M8 x 5 hole
Guide Support bearing 2EA : 31307853702
Alloy Strut brace (left steering) 1EA : 31127855855
Torx bolt M10 (alloy SB - top) 56Nm 2EA : 31106854219
Torx bolt M8 (alloy SB - mount) 28Nm 6EA : 31106859809
Fillister head screw M10 (alloy SB - edge) 34Nm 2EA : 07147162464
Blind rivet nut, flat headed 2EA : 51718065070
Cover, windsheild panel, Left : 51718059699
Cover, windsheild panel, Right : 64318059697
Engine hood sealing, Left : 51768058561
Engine hood sealing, Right : 51768058562
Expanding rivet 6EA : 51118174185
Stage 3 M4 Carbon (CFRP) strut front end
CFRP strut front end 1EA : 51618061631
Cross link (only Coupe & Sedan) 1EA : 51647294928
Hex bolt M8 (CFRP - front) 28Nm 2EA : 22326760945
Hex bolt M8 (CFRP inside) 28Nm 6EA : 11287839136
Stage 4 M4 Extension suspension cross brace + Diagonal strut
Extension Strut Tower, Left : 31122284857
Extension Strut Tower, Right : 31122284858
Link, Left : 31122284859
Link, Right : 31122284860
Torx bolt M8 2EA : 07147248303
Bottom reinforcement option only for sedan, coupe (Convertible already installed)
Stiffening plate 1EA : 51617299690
Torx bolt M10 2EA : 07147313416
Diagonal Strut 1EA : 51647294929
Adapter plate 1EA : 51647311426
Tort bolt M10 2EA : 07146959643
Hex bolt M8 4EA : 07147321202
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