Hi everyone, I purchased this '04 F150 Screw Lariat a few days ago from a private party off of Craigslist. The previous owner didn't know much about any modifications which had been made to the rig (he was the 3rd owner). Its got dual exhaust pipes and has a definite rumble so I'm guessing it has some sort of aftermarket exhaust but darned if I can figure out what brand. Does anyone have an idea what this might be? Any help would be appreciated.

View from back:


A few shots of the muffler:

 

kiiinda looks like a real old flowmaster??

 

mac?

 

No clue. Never seen a muffler shaped like that.

 

Not Flowmaster, That muffler is shaped way different, and the only DI/DO Flowmaster is the Super 44.

Thats definitely not a cat-back. I'm gonna also vote for MAC. Its shaped like MACs and natural finished stainless.

 

i think its hooker.

 

yea that shape is weird

 

Thanks for the guesses so far, I'll google MAC and see if there are any pix that look like mine. The exhaust system is a true dual with the exception of the pipes coming together at the muffler. The truck is an 04 so this system can't be that old.

 

also look at hooker muffler. they are those rectangle shaped ones, but their black. maybe the black faded idk. but look of hooker mufflers too. worth a shop

 

found it. it is a hooker aero chambered muffler heres the link

http://cgi.ebay.com/ebaymotors/Hooke...01510010r37042

 

cool how does she sound?

 

You are correct Sir! I found the DIDO on Hooker's website (bottom of page):
http://www.holley.com/types/Aero%20Chamber.asp

Thanks for everyone's help, one mystery solved. Next one is how to figure out if its got a custom tune.

 

Nice rumble, not overpowering in the cab at all at idle or WOT. I have a 78 Blazer w/ a true dual exhaust and Flowmasters and this is a bit more mellow.

You can definitely hear it coming down the road though, everyone in my neighborhood knows I have a new truck.

 

Good find Migdaddy, I never would have guessed it was an Aerochamber, I thought they were polished stainless.

Theres a few ways to tell. Does your OBDII port have a cover on it? Is your truck fast on the start off? meaning do you have throttle lag ( accelerator going down, transmission not shifting quick enough ), can you break 100mph?

 

Looks interesting lol