I have a 07 FX4 screw and i want to put an exhuast on it. Does anyone have pics of a similar truck with the Magaflow 16617. What is the difference between that and the 16616?? I am currently undecieded between the two straight pipes out the back or dual exit infront of the tire. Also do either have alot of drone on the highway because i drive 50 highway miles a day. Thank you before hand.

 

I used a universal Magnaflow (12288) SI/DO and had custom pipes bent for a dual behind the wheel exit, Harley Style. No droning, I do hear it at over 2k rpm but when it drops lower and cruises you can hardly hear it.

But after all, we do want to hear it right, thats why we got it.

 

I have the Magnaflow Lightning style. I'd give you the part number but for some reason we had to get a different extension pipe for my truck. Anyway, it's loud on hard acceleration and even causes some rumble through the cab. Anything under 2K rpm, you don't even know it's there. If your commute includes any long uphills where you might downshift there's gonna be some drone, otherwise at speed you only can faintly tell they are installed. Pics. on my gallery. My truck is an '04 Lariat SCrew 4X4. Install was easy once I figured out how to get the stock hog out and replaced the extension pipe. Took a little while, but I think I really like 'em. Mileage appears to be a tiny bit better, maybe.