how would the JDm headers compare to a product double there price. I know you get what you pay for, but is the extra money you pay in the wuality of the build, or in the extra horsepower?
i suppose what im trying to get at is in comparison with the AUSDM OEM manifold, OEM ECU and OEM Catback (for now) would the gain really be very noticeable between the JDM 4-1 or say a BC 421 or Today 421?
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