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Uncertain. I like that the stock exhaust shape effectively acts as a diffuser. I intend to bribe Marin for some logging and maybe some tweaks once I hang the gutted stock manifold. Cat back will likely be stock modpipe and a modified stock muffler or the STi muffler. At the power level I exist at a 3” is overkill and most sureness would drone. I’ll give up 5-10hp to be happy with noise levels since the car gets used randomly/sparingly/my drive to SEMA for work each year/a run to California to be disappointed in an event.
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