wait i found some mixed reviews on the product from autoanything.com
"2005 Superduty 6.0 diesel. Install would have been faster if maker had cut slots for original plastic intake in correct spot. Had to cut slots wider with Dremel tool. After that fit was ok. Around town and at idle noticed more noise (naturally)and performance and mileage about the same. After pulling trailer to Colorado, unit seemed to perform well, no increase in mileage, but off idle turbo boost seemed to be slightly more responsive. Very loud and bad noise when let off on it on slight grade with maybe 4lbs boost at maybe 25 to 40 mph. Sound like back pressure from turbo and very loud. Loud enough for concern. Had my oem unit with me and pulled the S&B unit off and put it back in the box. Noise went away. All areas were sealed good when this noise was evident. The noise I mentioned sounds like someone trying to tear the firewall out with a backhoe and I am not kidding. I liked the design of the system, but am not impressed at all with the performance. I had done lot of research on S&B before purchase. They have a good article this month in Trailer Life but I am not impressed after using this system and I waited for about 2 mos before sending this reply because I wanted to give it a good chance. If someone from S&B would like to reply to this report I would like to hear from them, but until then I will continue to run the Original system and the money spent for this system was wasted as far as I am concerned. JS"
"PUT THE S&B ON MY SUPER DUTY AND IT SOUNDS GREAT AND I GOT IT FOR A GREAT PRICE.THANKS FOR THE GOOD PRODUCT AND PRICE. TOOLMAN"
"I have not seen any change in fuel miliage or power in my 2004 powerstroke. Icould buy alot of air filters for what it cost for my S&B air system."
"My system arrived in good shape. It was easy to install, about 45 minutes. It has complemented my new chip and 4" exhaust on my F-250 diesel.More power and mileage. The fit wasn't perfect,but a little foam tape took care of that problem."