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The 240 stock exhaust manifold is indeed quite efficient and a header would be more for looks. I'm running an Enem V15 cam with a Unitek header and 2.5" exhaust. It allows the engine to breathe better but low-end is sacrificed for high-end power.


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'92 244GL silver-metallic, 152k, Enem V15 cam, Bilstein HDs, IPD sways, upper+lower and Cherry-Turbo strut braces, 240 OEM rear wing, 15' Dracos, SS lines, E-codes w/side repeaters, Euro cowl covers paint-matched, Magnaflow 2.5' SS exhaust, Unitek header
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