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Old 29-10-2015, 01:18 PM
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Brett Allan Brett Allan is offline
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The way I understand it and I guess nut shelled ;

A twin scroll design essentially splits the exhaust gasses going into the turbo in order to combat the exhaust gasses from opposing combustion strokes colliding with each other.

Essentially it reduces lag, increases flow into the turbo and produces better torque.

Only the JDM STI were factory fitted with them afaik.

using the Perth-WRX mobile app
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