Bumper decision for my single exhaust?

Or the bumper from a base model with/without the PONTIAC filled?
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And, it's a GXP, doing single 3" exhaust to cut weight and improve flow.
Think I'll just stitch it, get a plate that reads THATHRT or THTHURT, and call it a battle scar.
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And to do what I posted in my intro thread on 318, hit 10s, but that goal is a good long way away. 
