Thread: SCOOP: Subaru didn't want D4S (and neither do I)
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Old 02-05-2012, 02:39 PM   #79
tranzformer
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Quote:
Originally Posted by carbonBLUE View Post
Port injection is the answer to carbon buildup on the intake valves that's why the car has both
Is that in theory or actually been shown in real world experience? Asking cause I don't know.
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