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A cheap header is probably better than the single downpipe manifold.
A dual downpipe manifold is better than a cheap header.
An expensive header (from Sweden or VPD) may be better than a dual downpipe manifold, depending on the application.
Interestingly, R-Sport recommended their 4-2-1 header for use with the Stage I and II tuning kits (and possibly the GT kit -- I don't remember without looking it up), but for the Stage III and IV kits, they reverted to the iron dual pipe manifold. The downpipes were extended 4".
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