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Old 05-30-2014, 09:36 AM   #4
grocerygetter
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Drives: 2020 6.2 Trail Boss, 2022 XC90
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had exact set up...I'd bet if you are seeing 10psi with cats on a 3.33 you have an intake restriction. So, put the 2" headers on and drop 1-2, but put an ECS filter on the head unit and pick up just about that. Should keep you around 10psi. ECS or FSP can sell you the filter.
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