I custom made a structure in 2017. I also drilled out the holes where the subframe bolts threaded into and use a 1/2" grade 8 bolt which bolts the structure and rar subframe to the floor. The bolts are torqued to 120 ft/lbs.
I did make a mistake...I should have tacked the assembly and then welded it the structure outside of the car. Welding would have not been such a massive challenge...and also would look a lot better
Then I tied it onto the strut towers and roll cage. There's also two bars that go from the two front mounts to a bar between the main hoop and rear bars. So all 4 corners are tied into something else.
I did make a mistake...I should have tacked the assembly and then welded it the structure outside of the car. Welding would have not been such a massive challenge...and also would look a lot better
Then I tied it onto the strut towers and roll cage. There's also two bars that go from the two front mounts to a bar between the main hoop and rear bars. So all 4 corners are tied into something else.
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