Value question: OEM manifolds or shorty headers?

[Charlie207]

Ignoring that shorties don't add performance points to any engine, and looking at only cost, should I just get a set of Speed Engineering cold-water (cold,... get it?) headers vs. a set of new cast iron manifolds?

Long-tubes would be optimal, but my state frowns on deleting stuff, and a drop-in option is in my price range for now.

What are the 2-4 year (long term) downsides of shorties? I'm planning for an engine swap on a DD, and since it needs new manifolds anyways I might as well make it look cool.

Talk me down off this cliff.

 

[Foggy]

To me, Headers are better. Little bit lighter and oddly in my 6.2 spark plug
access was a bit better. I still have my OE exhaust components in storage, but
I never weighed them or anything. IDK if the 6.2 manifolds are the same part #
as the 5.3 manifolds though

 

[buckwild27]

If you get them make sure you get the bolts tight. Headers of any sort I've seen bolts work their way out on a regular basis.

 

[Doubeleive]

If you get them make sure you get the bolts tight. Headers of any sort I've seen bolts work their way out on a regular basis.

^^ this, best thing you can do is add some locking header bolts, that was always my main complaint couldn't go more than a couple weeks without the bastrds working there way loose. Other than that I just make them crack eventually but I am not the average driver. someone like me is better off with good o'l cast iron

 

[buckwild27]

^^ this, best thing you can do is add some locking header bolts, that was always my main complaint couldn't go more than a couple weeks without the bastrds working there way loose. Other than that I just make them crack eventually but I am not the average driver. someone like me is better off with good o'l cast iron

Yep, couple of weeks sounds about right. Unless you were really giving it the business.

 

[Trey Hardy]

Ignoring that shorties don't add performance points to any engine, and looking at only cost, should I just get a set of Speed Engineering cold-water (cold,... get it?) headers vs. a set of new cast iron manifolds?

Long-tubes would be optimal, but my state frowns on deleting stuff, and a drop-in option is in my price range for now.

What are the 2-4 year (long term) downsides of shorties? I'm planning for an engine swap on a DD, and since it needs new manifolds anyways I might as well make it look cool.

Talk me down off this cliff.

Anything over a 5.3 you would be best to have bigger exhaust I have 1 7/8” speed engineering Longtubes and full 3” exhaust and it made a noticeable difference for sure shortys never made any power difference in any buddies of mines trucks over the years if anything it made the exhaust drone and frap more where the Longtubes really open and deep in the tone of the exhaust
I’ve put Longtubes on all 5 of my trucks I’ve had over the years same brand speed engineering

 

[buckwild27]

You could put long tube headers on and put high flow cats on the headers directly

 

[Charlie207]

Read all the comments so far.

Obviously LT headers are better, but my two choices right now are shorties or cast manifolds.

I have to spend $350 on a new tune for the 6.p swap, so I don't want to do it twice for a 5.3 LT headers tune, then a 6.0 swap tune. (Think weekend swap, needs to be running by Monday)

LTs are certainly on the table, in the future, but I'd rather have the 6.0 running reliably before I add LTs and custom work to make the cats fit.

Just looking for reasons why I shouldn't get the shorties vs. cast iron.

 

[buckwild27]

Read all the comments so far.

Obviously LT headers are better, but my two choices right now are shorties or cast manifolds.

I have to spend $350 on a new tune for the 6.p swap, so I don't want to do it twice for a 5.3 LT headers tune, then a 6.0 swap tune. (Think weekend swap, needs to be running by Monday)

LTs are certainly on the table, in the future, but I'd rather have the 6.0 running reliably before I add LTs and custom work to make the cats fit.

Just looking for reasons why I shouldn't get the shorties vs. cast iron.

If you're doing the 6.0l swap later worry about changing them at that point and do it once. There is no gain other than changing the way it looks

 

[Charlie207]

If you're doing the 6.0l swap later worry about changing them at that point and do it once. There is no gain other than changing the way it looks

The 6.0 swap is happening sooner than later. Already contacted BBP about the tune.

I can spend $200 now on shorties, which won't be different than cast manifolds, tune-wise, now and not add the complexity of getting cats welded to LT headers and all that jazz.

LTs are better, but let's all just pretend they aren't an option. Im thinking I can throw a set of shorties into my 5.3 engine bay now ( the current 5.3 manifolds are gross, and leak anyways) and at least have one less operation to deal with when I get all the parts & stuff prepped to attempt the 6.0 swap.

 

[buckwild27]

It's a wash man. Do you want Heavier cast iron manifolds or do you want lighter Shorty Headers? No performance benefits as we all know. LT's are out. It comes down to what you want since they're the same price. You'll probably want to wrap them too, thinner metal more heat. Locking header bolts are a must. By the 3rd time of replacing missing bolts or Tightening up the loose ones You'll be wishing you went with the cast iron manifolds.

 

[j91z28d1]

do the shorty's they will have a resale value of something. not much market and bad to ship cast iron.


for bolts, don't use them.. use studs. I worked at a mustang performance shop forever ago, when the 03 corba was a hot new car. every one of them got full exhaust. headers and all, not one ever leaked, you know why? cause we threw away the bolts and gaskets that came in the box, reused the oem exhaust gaskets, MLS just like the stock ls are and reused the oem studs with flanged crimped lock nuts.

as long as the headers are decent metal and welds, with at least half inch thick flanges, they will probably out live us on the truck.

you know what size the ls header bolts happen to be? the same m8 1.25 the mustangs used back then. went I put zo6 exhaust on my ls3 car I grabbed 2 sets of Dorman Ford stud kits at the local parts store for 11$ each. they are 10.8 rated and super cheap, you'll pull the threads out of the head long before you break one. arp bolts are nice, but a loose bolt is still annoying no matter how strong the metal is.

 

[donjetman]

are you might use these:

 

[gooffeyguy]

Nooo, not stage 8 locking bolts! Those are the biggest pain in the ass. Not only because of the C-clips, but getting the locking tabs aligned usually requires the bolt to be a bit under or over torque, or having to grind it down a bit.

Split lock style header bolts are much easier and are actually cheaper

 

[Charlie207]

do the shorty's they will have a resale value of something. not much market and bad to ship cast iron.


for bolts, don't use them.. use studs. I worked at a mustang performance shop forever ago, when the 03 corba was a hot new car. every one of them got full exhaust. headers and all, not one ever leaked, you know why? cause we threw away the bolts and gaskets that came in the box, reused the oem exhaust gaskets, MLS just like the stock ls are and reused the oem studs with flanged crimped lock nuts.

as long as the headers are decent metal and welds, with at least half inch thick flanges, they will probably out live us on the truck.

you know what size the ls header bolts happen to be? the same m8 1.25 the mustangs used back then. went I put zo6 exhaust on my ls3 car I grabbed 2 sets of Dorman Ford stud kits at the local parts store for 11$ each. they are 10.8 rated and super cheap, you'll pull the threads out of the head long before you break one. arp bolts are nice, but a loose bolt is still annoying no matter how strong the metal is.

Do you have a part number for those studs?

I just stopped at AutoZone, and the only head studs they had in-stock were the wrong thread pitch.

 

[Charlie207]

These look like they'd work.

Dorman Products - Aftermarket Auto Parts & OE Solutions - 03133HP

Exhaust Flange Stud Kit - M10-1.5 x 62mm Stainless Steel

www.dormanproducts.com

 

[donjetman]

Drill the head and safety wire them (aircraft).

 

[Charlie207]

I just checked with a tap, and confirmed by the assembly manual, and the exhaust manifold bolts are M8 x 1.25, which is different than the M10 x 1.50 that the Dorman parts list, even though they say it's a direct fit.

 

[Charlie207]

These look neat.

Pardon Our Interruption

 

[j91z28d1]

These look like they'd work.

Dorman Products - Aftermarket Auto Parts & OE Solutions - 03133HP

Exhaust Flange Stud Kit - M10-1.5 x 62mm Stainless Steel

www.dormanproducts.com

sorry, yes they make a m8 by 1.25.


let me find them..