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      10-12-2021, 05:56 PM   #21
pbonsalb
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Drives: 18 F90 M5, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: New England

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Really good question. Probably getting rid of the bigger primary cat makes more power. Probably getting rid of the smaller secondary would be best for smell. If money was no object, I would buy HKS 200 cell primaries and run catless secondaries. If all out performance was the goal, I would run catless primaries and secondaries.
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