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mine taps straight into the drivers side of the pi intake (from a "t" fitting at the passenger side). I destroyed a couple spark plugs before doing it, no issues since.
what does this coolant mod do? i assume help cooling of the engine.. but more details would be appreciated.
from what I've read, 99% of engine failure is either cylinder # 7 or #8 b/c there is no water running back there to cool them off, this prevents that and allows you to run more timing, etc.