I been looking and cant find it. Someone on here told me they used to remove the factory shorty headers off of mustangs of a year range and they would bolt directly up to our trucks with the use of a spacer on the driverside.

Does anyone know anything about this?

I am working on piecing a price list down for my crate engine and I am thinking of going the shorty header route but the shorty mustang headers I found are listed as fitting 60`s to '79. The one that fits '80 does so up to the '90s and they look like they are longer headers not the shorty.

 

I would think shorties for a later model fuel injected f150 would fit better than mustang headers. We had a thread recently when someone was asking about this, and we found out the exhaust manifolds are the same part number for the early f150s and the later fuel injected f150's, so from that we figured the y-pipes must hook up the same, and that the later shorties might have a good chance of fitting the early trucks, even the carbed ones, and the O2 sensor hole would be the only thing that would have to be plugged to make it work. I do not think that guy ever wrote back in and said what happened though.

 

Hmm interesting thought though. I will have to look into it.

I will have the exhaust done on the truck after I am finished I just want to make sure the headers I get will fit and not be facing the firewall or facing the shift linkage. That's why I am looking at the shorty headers preferably with the ball and socket flange for better sealing.

My current line of thought is 2 1/2" collector shorty headers then run 2 1/2" pipes to the stock muffler location and in the stock location I am thinking of having a muffler with two 2 1/2" inlets. I am flipping back and forth I was going to have two outlets in probably 1 3/4" or 2" and run one out each side behind the rear tire. How ever now I am thinking maybe I should just run a 2 1/2" or maybe 3" pipe out the back of the muffler and have it exit behind the passenger rear tire like stock.

I might change the sizing as I don't want to go too big since this is a driver. But I need to get my pricing down so I know what I am looking at for this task.

 

I thought I read somewhere that with certain brands of Mustang headers there is a fitment issue with the starter/bell housing on trucks due to the larger flywheel. That could be wrong...so don't take it as gospel. I was reading about somebody having fitment issues, but it might have been that the Mustang headers fit OK, but the passenger side header had to be removed to pull the transmission out.

 

With the shorties you should be able to run the stock y-pipe. It tucks up nice and neat behind the oil pan when it crosses over. Would save a lot of hassle. You just need to find one that doesn't have cats in it. Or maybe you do need the cats depending on were you live.

 

I have to take a look I cant remember how the pipes run on this truck. They are the stock pipes how ever. As far as cats goes, truck is safety only and after I move there is no emission testing so even if I had a new vehicle its still safety only.

Aside from that I don't mind having new pipes made in the stock configuration.

I was looking at Headman Headers and I came across the Street header with the number of 89470. This is a 1 1/2" primary and a 3" collector attachment. It also states its a stock collector size and style. It states its for '86-'96 F150, F250, F350, Bronco 2-4wd 5.0L. I know for a fact the frames on these trucks didn't change up to 92 and I know for a fact the cabs themselves were the same 80-92 as well. So if this shorty header will fit a '86 - '96 then it should fit the frame and cab just fine.

Now the big question is will it fit my oem factory exhaust hook up or not. Maybe I need to get a stock exhaust system kit from one of the places I know for say a '86 F150 that way I can just bolt all new in.

https://www.hedman.com/product-detail/89470

In the end if I do this and route the exhaust like factory well then I will only need a single muffler inline. Have to figure out which muffler to go with. Also need to decide if I should go larger on the exhaust pipe or just stick with the stock size since the headers do say they are stock size and style.



Well scratch that. Waldron that makes the exhaust kits for old vehicles they only sell a cat back kit. They don't sell the manifold to cat nor the cat itself. So now I am in a position of looking up OEM part number for the pipe to converter so I can take and source hopefully a NOS one. Maybe I will put the converter back on the truck but I don't see the need.

 

That's because technically it's illegal to modify the exhaust up front of the cat unless you put "for offroad use only" in your product literature. That's a can of worms a lot of manufacturers don't want to get into.

 

Well here is what is strange though.

I was looking in my parts and illustration guide and for a '82 and a '86 this pipe that connects to the manifolds themselves share the same part number. So if the shorty headers are '86 - '96 then they should fit '80-'85 as well.

While looking for part numbers for this pipe its a 5246 group number. For '82 - '86 E0TZ-5246-R, this is for a 302 Fseires truck without converters. The drawing shows this pipe is a straight pipe from the manifolds to the muffler itself. For one with a single converter the part number is E0TZ-5246-D.

So Ford offered a non converter equipped exhaust pipe for these trucks so I would assume there should be a place making them since Ford offered the part as well.

 

That was the whole reason the "F150" came about. The government put out emissions rules at some time or another, and they were based on GVWR of the vehicle. So Ford and the other OEMS got around that by building their trucks just over this GVWR limit, and called them a different name. Later on the gov upped this GVWR number and it finally caught the 1/2 ton pickups. And as you see today with the big diesel trucks having cats and EGR's, they finally raised the GVWR up high enough to get those heavy pickups also.

So if you plug in a early pickup, you will probably avoid some of the emissions stuff. And a truck made in Canada will have even less on it.

 

Yep. Since I currently don't have a converter on the truck I am thinking of plugging the air pump holes in the GT40 heads and taking the spare alternator/pump bracket I have and cutting the pump ears off it to make it appear to not have a place for an air pump.

Just be nice if I could find a oem pipe like this without the converter it would make a factory style exhaust easier on me.

 

Is this the pipe you're looking for? An "offroad" Y-pipe to fit factory exhaust manifolds?

http://www.jegs.com/i/JEGS-Performan...830+4294829829

 

That would be the pipe.

I bookmarked that just in case cause I might have to go with that. Waldron got back with me today and told me they don't make them but they have a bunch of NORS that they have in stock that would cost some where between $140 and $170 before shipping. I asked them if they happen to have a E0TZ-5246-R as that's the one without converters.

If not I could buy that jegs offroad Y-pipe and substitute the y pipe to converter pipe for a longer straight pipe that will hook up with the Waldron exhaust kit that they sell which is a cat back design.

Well they told me that they don't know anything about the part numbers. All they know is they have two kinds. They have the California compliant ones which no aftermarket makes. Then they have the non California compliant one. I figure both are with converters. So it looks like I will be going with the Jegs one. Sucks cause that puts me up a bit higher. I had almost $1,000 knocked off my price but it seems that's about the cheapest I can go as no place ive found is cheaper than Summit for the parts.