Magnaflow Exhaust
 

Trying to finish up my exhaust modifications tomorrow or Thurs, figured I'd post a video of the "before" I get out the saw and welder, lol.

What you'll hear here is an all Magnaflow setup:

High Flow Cats, removed y-pipe and replaced with an x-pipe for true duals, two 14" oval Magnaflow single chambered mufflers run to a pair of 3.5"x18" rolled edge tips.

Tomorrow I'm going to cut out the high flow cats just to see how it sounds and performs for a week or so, then depending on what I decide I'll either weld in my "replacement" pipes or remove the pre-cats and put the high flows back in so I only have 2 cats, why Ford decided to put 4 on these beasts I don't know. I'm sure there's a logical explanation.

I'll update with new exterior and in-cab clips after tomorrow/thursday.

http://www.youtube.com/watch?v=GRQC9jsI2Ao

Man, does that sound nice or what? Good job on that! It's got a nice note without being loud and obnoxious.

No doubt about it, Magnaflow does make a nice setup. :2thumbs:

Cut out my rear cats today, I'd SWEAR my truck's quieter now. What gives!? I'll post vid clips tonight!

Which Exhaust ??
 

Hey Bill, What exhaust do you reccomend for 08 F150 supercrew 5.4 for daily driver and light towing? Looking for HP and MPG but still fairly quiet. Going to get a Gryphon with your Custom 87 performance tune but think I should get exhaust first, no CAI planned. What have you seen work? Single exhaust is ok . Thanks: Jim

Here's some new clips since I removed the rear cats yesterday afternoon :)

Start Up & Revs
http://www.youtube.com/watch?v=j_Wtv...eature=channel

Interior Sounds 1
http://www.youtube.com/watch?v=IysCo...eature=channel

Interior Sounds 2
http://www.youtube.com/watch?v=QDMhQ...eature=channel

Corey made a great recommendation there! I know you're asking Bill, but I'll chime in too if you don't mind :howdy: The first exhaust mod I made was to replace my factory muffler with a 14" SI/SO and really liked it. With your truck having only 2 cats as opposed as the 4 mine came from the factory with, you'd a bit louder than I was with the SI/SO swap. A magnaflow SI/DO would be cost effective and sound even better! I'd probably stick with a 14" or 18" certainly nothing larger if you want more sound.

Magnaflow SIDO
 

Thanks for the quick replies Corey and Dixie, sounds great but I am looking to not be too loud, what do you think. Jim

What does removing the rear cats do to you at inspection time? I had no idea the new trucks had FOUR cats. :omg: With that much restriction, I'd bet exhaust doesn't do much for you performance wise unless you remove at least one set. GEEEZZZZ the government is killing the hot rodder....stupid government.....:mad2:

Can always start with a 14" SI/SO, from what you've said thus far I'd say you'd be thrilled!

As for my inspection woe, have none. Down here in South Georgia they don't only skip the "sniffer" we don't even HAVE inspections!! :thumbsup:

Well that makes it easy...I don't have it so lucky here in North Carolina. It's a fairly extensive check that includes a sniffer and hooking you up to a diagnostic computer. That's another reason I'm a little worried about having a tune in place when I get the inspection, the sniffer could be bypassed by a more efficent tune for sure, but what does that computer tell them?