Yes OP the detonation caused by overlean running even without tracking causes even more heat and can cause long term damage. The power loss Clint (a sought after record-setting time attack driver and professional instructor) is debating with Cossie (Cossie) could be attributed to temperature-related less-than-optimal combustion, so you really have to retune the car right after a major modification like cat-eliminating LTH's.
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