wow; that's almost perfect for the 3.4L tuned to 6700RPM torque peak.
which engine are you running them with? how's the build quality? notice a power improvement over stock? thanks.
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Originally Posted by Fluellen
How small do you want the primary diameter to be?
I have M2 (ebay) headers; they have a 42mm primary OD. This seems a pretty reasonable primary size to support a 250-280 hp car.
I guess you could increase midrange torque a bit by going to a slightly smaller diameter.
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