I'm useing the K&N REO880 and I made my own cone housing ,drawing air from the stock location,I also cut into the cone a 3'' angle fitting and am pulling air from other side of engine compartment up near grill. the reason for all this is because an engineer buddy told me the hole in the firewall had a negative pressure and wasn't as good as drawing air in from the front of truck it did make a lot of sense so thats why I made new cone out of 26ga. galv. then wrapped the entire con with waffer duct wrap we use in the H. V. A. C industry so the air stays cool. I just need to find some material I can wrap turbo with,any suggestions would be appreciated,it is a california truck if that makes a difference. thanks in advance for any help
Joe Moglia