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Well first off it's a JDM b18c1, making 180, as the USDM b18c1 makes 170hp.
The size of the exhaust is 2.5" and it is ceramic coated if that makes a differance.
As far as cold days go, there aren't many here in AZ.
What % of a horsepower increase should a person expect from an intake maninfold on a B series engine? Say a Skunk2 intake manifold.
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