Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Advice on rear shock tower reinforcement

Recommended Posts

I am in the planning process of upgrading the back end of the 02 with e21 323 rear trailing arms and discs and converting to coilovers front and back.

I'm keen to see what others have done to get this to work, and to hear of any other problems I haven't thought of.

At present the rear towers are in great shape, but I realise that I want them to carry more load than they were designed for so am open to ideas.

"Why is one of my reverse lights on in 4th?"

Link to comment
Share on other sites

I'd say there are 3 realistic options, depending on what you're intended use is.


1) Weld (not just bolt brace) some bars between the rear shock towers (top bar then X-braces below).



2) Some type of U-bar (with bracing), connect the shock pickup points to the bar itself. Here's a picture...



3) Tie pickup points into roll-cage.

I don't have many photos to pull from at the moment... here's one example from Heist....


Link to comment
Share on other sites

As long as they're not rusty, the rear towers are hell- for- stout.

The 'cans' that hold the shocks can use reinforcement on the tops, but

that's about it.

I used 320 trailing arms on the race car, and extended the mounts to

let me use longer shocks. But the stock 'can' is plenty strong to do

the job if you spread the load on the top of it.



"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

Link to comment
Share on other sites

At the moment the car is primarily a road car that sees a few track days a year.

What I've been thinking of doing is either welding a thicker plate to the top of the can and a bar/brace between the two, or removing the cans completely and welding in new thicker walled ones that are taller, allowing for a longer travel shock. If I go the section option I'd incorporate a collar at the base of the can that was within the wheelarch. Again this option would have a brace between the two cans.

Something like the one below:


"Why is one of my reverse lights on in 4th?"

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Upcoming Events

  • Supporting Vendors

  • Create New...