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I installed tru duals on my 07 road glide. Before I removed the factory pipes and mufflers, I used a thermal heat gun to measure the temp, on top of the cylinder heads just to the left of each spark plug. I have yet to install and aftermarket tuner. Anyway, after comparing each set of pipes on same temp days on the same ride I take each day, I can say that the temps have come down by no more than 10 degrees.
So yea, they lower the temps just ever so slightly.
I installed tru duals on my 07 road glide. Before I removed the factory pipes and mufflers, I used a thermal heat gun to measure the temp, on top of the cylinder heads just to the left of each spark plug. I have yet to install and aftermarket tuner. Anyway, after comparing each set of pipes on same temp days on the same ride I take each day, I can say that the temps have come down by no more than 10 degrees.
So yea, they lower the temps just ever so slightly.
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