I run stock cats with my ARK and am plenty happy with the sound. That said, ART is probably the most tame test pipe for our cars. Given the hemhotlz resonator design, the ART pipes will probably keep drone down more than a normal test pipe. The ARK hfc also has this so it'll probaby be even more tame
Last edited by b15; 02-10-2015 at 12:55 AM.
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