Stay on topic here guys. He's looking for ACTUAL owner feedback, not another post asking which subframe is better. If you do not have feedback from customer experience, please stay out.
The frame rails on the camaro chassis are 2x3 box tubing. The exhaust holes in the side have little to no effect on the overall rigidity of the design. If you feel they will hamper the rigidity, I'm sure Jeff can delete them from your particular one.
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