Has anyone installed a M7 Under Strut System on there car? worth the money or didn't make a big enough difference?

 

I had it installed on my car for the last 4 years. Yes, it does stiffen up the chasis quite a bit.

Why do you think you want it?

 

You may want to consider the TSW X-brace.

 

I agree with slinger688.

Mine was installed several years ago in time for a DE at Road Atlanta. I could feel the difference in the turns although it was part of my larger scheme to stiffen the front with a M7 strut bar, and a larger rear sway bar. I've been very happy with the results.

 

+1

 

Does anyone know if either under-body strut set up is compatible with the GP rear diffuser tunnels? It looks like they would be but I would hate for somebody to spend money on either or and find this out later.

 

Don't bother with the M7 USS, had nothing but bad luck with it and noises.

The TSW X brace does the job right. As for fitting with the untrays, I've had people cut holes to the subframe bolts and install them. Otherwise the trays cover up the bolt holes.

 

I have the same set-up minus the under brace

 

is the x brace more streetable?

 

If I remember from Physics class, the X design is far stronger than a conventional rectangular shape.
So technically, the TSW X-brace should be more effective than the M7.

 

Everyone has a street car, just some think they are race car drivers. I don't know of any brace system besides a roll cage that would make your car less streetable.