Quote:
Originally Posted by kpewpew
Can you clarify what the risk is running stock cats at tracks? Done about 16 track days in my car so far, stock cats, stock mid pipes, aftermarket muffler. No problems so far. Switching to MPE soon due to Laguna Seca sound issues. Been failing sound lately.
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The cat can collapse and not let exhaust out. See his thread on engine malfunction.