I was set to purchase Magnaflow part no 16612 cat back for my 2004 F150 supercrew. I got my build date from Ford and it's June 1st 2004.

I' m wondering if I should order the 15821 part instead.
I understand the change in the intermediate pipe was after June 2004.....My question is: How can I tell if I have the older intermediate pipe or the newer one used from 2004 1/2 and up to 2005?

My thought is that my screw is built right on the 'bubble' of the date where the change was implemented...So which part was used on this day?

Thanks

 

I wasn't aware of an issue with the 16612 (which is the SISO setup (like I have))...

Hmm...

RP

 

I know this is kind of a dumb answer..

Crawl under your truck and look?

 

Thumper mx113

Sure my back at 40 ain't that bad yet....But what do I look for specifically.......

Thanks

 

jdf...it will take some time, but use the SEARCH function (type 'Magnaflow') and you'll find installation pics of the both the old and new intermediate pipe so y'all can compare to yours.

 

I did an extensive search and was unable to find any pics showing the difference...I did find a earlier post requesting a link to the pics...But I went back as far as I could and was unsuccessful....Any help would be appreciated....
Thx JD

 

jdflhr,

Not sure exactly when or where I will buy my Magnaflow SISO exhaust, but I am going to ask several vendors to see if I get the same answers. I have a JUN 10, 2004, KC "Built Ford Tough" Supercrew FX4 (with factory towing package) and I sent an email to Hottexhaust and this is what they said:

Hottexhaust reply:
"Your June 10 build date would bring you into the newer systems....The Supercrew uses part number 16612....your total shipped price with the coupon is $ 367.89.

Any questions, please feel free to contact me."

 

If I am not mistaken, the trucks made before June 2004 have a longer pipe that connects the muffler to the intermediate pipe. On mine, which was built July 2004, has a short pipe on the front side of the muffler, about 12" long, that has an s-bend in it. I believe on the trucks before June, this pipe in front of the muffler is longer (18" - 24"), and doesn't have as much of a bend in it. You are going to have to crawl under the truck and look. Hope I could help!

EDIT: I just found pics of what the June 2004 and later exhaust looks like. You can see the shorter intermediate pipe as I specified. The pre June 2004 is longer and has less of a bend in it. I hope this is what you were looking for:



And this is what the before June 2004 muffler looks like


The hanger on the muffler here will not be the same as the one on your truck, yours should be mounted to the frame, but the may or may not be. Just wanted to make a note of that. Just FYI.

 

Guys...

He has a SUPERCREW... I thought this problem was exclusive to the SUPERCAB and the SIDO systems?

Were the hangers on the early SCREWS also different?

 

RP,

This problem is with all the supercabs and supercrews out there. When they switched to the '04 1/2 - '05 exhaust, the same intermediate pipe setup went onto both trucks. It is also for all of their exhausts, SIDO, SISO, both of them. I got the SIDO, and I had this problem. I got the exhaust for the '04, and had to cut the intermediate pipe. If you look on Magnaflows website, they list the same exhaust used for a supercab, and crew cab. The same one is used for supercab with 145" wheelbase with eh 6.5' box. So the same exhaust that would be made for my truck would fit your truck, according to the website.

I believe the intermediate pipe issue is apparent with all supercabs and supercrews, as there is two systems list for both on the website, on for '04, and the other for '04 1/2 - '05. As I said before, I don't beleive this problem is isolated to supercabs. If I remember right JDMclemore had the same problem with his truck, and he had a supercrew. He had the intermediate pipe issue. I think I am right, but I could be mistaken. Someone else feel free to chime in if I am wrong. Hope I could help though!

EDIT: Reference this post for more info: jdmclemore exhaust issues

 

RP,

It looks like there are differences in the SCAB ("EC" according to Magnaflow) and SCREW ("CC" according to Magnaflow).

Two different websites have the same info pointing out differences in 2004 and 2004.5 trucks. Couldn't check Troyer's exhaust lists as there are errors on the website.

Hottexhaust
Magnaflow
Troyers

Not 100% sure - I am so confused now...

I have always been under the impression since this first came up that my truck was one of those that was affected...

 

You might be thinking of the issue with the dual exhaust systems and the factory tow package. This issue deals with changes around 5/31/04, or at least that's the cutoff date that I've seen most. Apparently a lot of trucks built late May/Early June have either set up which is causing the fitting issues.

 

That's what I was thinking about... I still thought it was just SCABS though...

I must have misunderstood. Sorry guys... didn't mean to confuse.

RP

 

No worries at all RP- I have the tendency to get confused very EASILY.

I have just been trying to figure this out for a while. I think I have it now, the 16612 is the one I need for my truck. I'll ask Mike when I place my order for the Stage 1 kit.

 

I can tell you that a 16612 won't work on a 133" wheel base Supercab.
Not without a die grinder.
The 16612 is made for the 145" wheel base.
Magnaflow does not make a Cat back for the 133" wheel base.