Chassis reinforcement question

Marquisz3

Dedicated Member
American Zeds
Joined
Aug 4, 2025
Points
43
Location
North Carolina
Model of Z
V8 roadster
Hey everybody i currently finished reinforcing the trunk and filling the channel gonna hit the lower half later but i had a general question of, is there any other non subframe areas you guys have or recommend getting to reinforce, i know on other bmw models a lot of people do things like strut towers etc but any recommendations on other things to throw some reinforcing on?
 

Zephyr

Zorg Guru (III)
Supporter
Joined
Aug 10, 2022
Points
139
Front underbody ladder. The holes are there. Just get some thick pipes and connect whatever holes availabe in an X or Y shape.

And also this
 

Marquisz3

Dedicated Member
American Zeds
Joined
Aug 4, 2025
Points
43
Location
North Carolina
Model of Z
V8 roadster
Front underbody ladder. The holes are there. Just get some thick pipes and connect whatever holes availabe in an X or Y shape.

And also this
Do you not reccomend using the stock X brace then or just reinforcing the brace itself?
 

Marquisz3

Dedicated Member
American Zeds
Joined
Aug 4, 2025
Points
43
Location
North Carolina
Model of Z
V8 roadster
Front underbody ladder. The holes are there. Just get some thick pipes and connect whatever holes availabe in an X or Y shape.

And also this
Gonna order the front portion where exactly do those mount to in regards to the front subframe?
 

Marquisz3

Dedicated Member
American Zeds
Joined
Aug 4, 2025
Points
43
Location
North Carolina
Model of Z
V8 roadster
Gonna order the front portion where exactly do those mount to in regards to the front subframe?
Oh nvm I just realized part of that is for motor mounts I actually won’t be able to use that since my motor isn’t mounted there
 

IainP

Zorg Guru (III)
British Zeds
Joined
Feb 20, 2019
Points
125
Location
Out of my Tree, North of Perth, Scotland
Model of Z
1.9
IMO the standard X brace isn’t up to much, it’s quite bendy, the Stance crowd take them off because they deform and crack sumps.
I made my own for one of my lads e36 and my Z .
CDs tube capped and bushed in place with new 10.9 bolts. There’s zero play, fish mouthed oval tubes with dimple die’d bracing. 3mm plate onto the subframe, 6x M8 rivnuts, 1 M10.
IMG_4934.jpegIMG_4935.jpeg
 

Marquisz3

Dedicated Member
American Zeds
Joined
Aug 4, 2025
Points
43
Location
North Carolina
Model of Z
V8 roadster
IMO the standard X brace isn’t up to much, it’s quite bendy, the Stance crowd take them off because they deform and crack sumps.
I made my own for one of my lads e36 and my Z .
CDs tube capped and bushed in place with new 10.9 bolts. There’s zero play, fish mouthed oval tubes with dimple die’d bracing. 3mm plate onto the subframe, 6x M8 rivnuts, 1 M10.
View attachment 346383View attachment 346385
That seems like a huge improvement for sure
 
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