Quote:
Originally Posted by regal
Yea every header is shit without a good tune. The tune is an integral piece.
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I completely disagree.
While it's true that a tune can improve on the power delivery and get the best result from mechanical mods, a well designed manifold can improve performance without it.
The ECU has the capacity to change timing and A/F ratio to compensate for the improved flow.
The GT86/BRZ is a rare case in which a map can make a real difference, on most natural aspirated engines the auto-adjustment of the ECU is already enough to get the most of the mods.