Quote:
Originally Posted by Tom Vaught
With the center of the cross-member cut out, you don't have a lot of support to keep the side rails from twisting on impact with the ground. Putting in the removable center bar will keep that from happening. The camaros and firebirds have additional support at the front of their frames (another cross-member) to help in this situation. People still install the removable support on those cars in most cases. The tube doesn't have to be very large, just stiff enough so that it doesn't bend from the forces pushing towards the center of the car. There is a lot of leverage on that lower arm trying to go inward and upward, diaper boy.
Tom Vaught
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OK, I have dropped my car more times then lil jack has kids and i dont have a removable x-member. You dont need it. I have a rigid engine limiter welded to what ever is remaining of my stock x member that bolts up to the stock engine mount on my block. It is not adjustible and slides in and out every time like a glove. If you look at his picture, he reinforced the stock x member with steel, that is what is done to mine. No theory here, just practical experience. I dont have a removable x member, i have dropped my car numerous times, you dont need it.