Evo X General
i was running an ams intake with invida q300 catback, and accessport tune. with that set up i was pushing 25 psi. when i put on a long downpipe without cats, and a perrin 3 port ebcs, after the changes, i ran the cobb stage 3 tune, and am only naking about 21.44 psi. i checked the hoses, none of...