I driving a 2007 Focus ZX3 - 5 sp - and tried using metal and rubber tubing to get warm air to the K&N filter that I'm running - with little success - so I'm heading down the road of adding a second heater core - tapping into the lines that connect to the heater core in the firewall - and basically setting it in front of the intake - and then the air filter on the other side of that - so in the end I will get a constant warm air intake temp year around - since living here in Indiana - can range from -10 to +100 - - CRAZY - I'll post the results later this month hopefully.
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