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Old 10-21-2019, 10:46 AM   #8
DSX_Camaro

 
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Drives: 2013 SW 2LT/RS LFX/AY6
Join Date: Feb 2013
Location: Orlando, FL
Posts: 1,741
The more cats you remove the more you will notice it. Secondary cats removed with only primary stock cats may have an improvement, high flows or catless would give an improvement you could definitely feel, each with a greater improvement than the option before. At most on a completely stock vehicle it could be a max of 15whp. But everything matters if you're chasing peak numbers.
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