Speed Engineering LS Swap Headers Findings

[19SIKtySix]

Originally Posted by gringoloco

They are the C10 specific (same part number as Chevelle) LS swap long tubes. The reason they work so well is due to the dropmember raising the engine. Stock engine location, I think the collectors will hang down 1.5” or so, too much for a heavily lowered or bagged truck, in my opinion.

I just noticed that you're running a coilover drop member, am I right? If your truck was bagged running a PB crossmember, do you think your headers would work?

I'm thinking to prevent for future clearance issues, the shorty headers would be a better option for me.

Thanks for your response and help on this!

[gringoloco]

Originally Posted by 19SIKtySix

I just noticed that you're running a coilover drop member, am I right? If your truck was bagged running a PB crossmember, do you think your headers would work?

I'm thinking to prevent for future clearance issues, the shorty headers would be a better option for me.

Thanks for your response and help on this!

No worries, this is why we post, to help each other out

Yes, the bagged Dropmember uses the same geometry as the coilover version, so they would fit with the same magic as mine, probably better, due to the absence of the upper coilover mounts.

For me, shorty headers are are not worth the pain that comes with them (blown gaskets, burnt wires, etc). There are a few nice mid-length options out there that will fit the bill and will not lose too much in translation. Hedman comes to mind with their C10 specific mid-lengths—thick head flanges, heavy gauge tubing, and ball/socket collectors. Uncoated I think are under $300

[rgrhoward]

Out of curiosity, has anyone measured the flange thickness on these headers?

I do not see it listed on the web site.

Also, any idea where they are made?

[NC_John]

Originally Posted by rgrhoward

Out of curiosity, has anyone measured the flange thickness on these headers?

I do not see it listed on the web site.

Also, any idea where they are made?

They are thick. A friend that is with ECR (their corvette racing side) looked at mine yesterday and thought they were actually kooks (high $$$). He was amazed when I told him they were cheap-o chinese specials.

[gringoloco]

Eyeballing, they look like 3/8” flanges. I imagine they are Asia-built, but very nicely done

[slowcpe]

Looks like I may have to order a set for my Level 1 DM truck. For once I don’t have to buy the most expensive piece out there.

[RockhoundII]

Here they are in my 79 Blazer. They clear the frame just fine, but require cutting on the passenger side of the 4l80E bellhousing. I had the same packaging issues some other people have mentioned, my driver side collector is damaged. I've had them bolted up to an LS3 with a 6L80E in the same truck and had no clearance issues whatsoever.

[RockhoundII]

Originally Posted by rgrhoward

Out of curiosity, has anyone measured the flange thickness on these headers?

I do not see it listed on the web site.

Also, any idea where they are made?

They are 3/8" flanges.

[rgrhoward]

Originally Posted by RockhoundII

They are 3/8" flanges.

Awesome! Thanks!

[michael bustamante]

update. installed mine last weekend in my 67 with a 4-6 drop, 5.3 dbw with 4l60. fit perfect, no trimming, no cutting no fabbing. nada... cleared the tranny and the starter no problem.
only part that sucked was I had to remove my brake master cylinder and booster to get the driver side in, now I gotta re bleed em again.

[bs46488]

I bought a set of the long tube 1 3/4 based on this thread.

5.3 with 4l65e and 3/5 drop in the truck.

The box showed up a little banged up but I just grabbed a crescent wrench and straighten things out.

The headers fit with no issues. I reused the factory trans cooler hard lines, so I needed to make some "adjustments" to the line to get them not to touch.

I installed the passenger side from the top. Drivers side from the bottom.

[1971Stepside]

I purchased the upgraded gaskets with mine, but not sure which gasket goes against the block and which one goes against the header. Haven't looked at them that closely, but it dawned on me while looking through this thread. Anyone have a pic or explanation on how I should install them? Thanks,

[aggie91]

Originally Posted by 1971Stepside

I purchased the upgraded gaskets with mine, but not sure which gasket goes against the block and which one goes against the header. Haven't looked at them that closely, but it dawned on me while looking through this thread. Anyone have a pic or explanation on how I should install them? Thanks,

You should not have 2 gaskets between the head and the header flange.

If you got sent 4 gaskets, then the upgraded ones should be the multi-layer steel versions. Without seeing what you have, The multi-layer gaskets should not have a specific side that goes against the head or the header flange...Just use one multi-layer gasket between the head and the header flange.

[1971Stepside]

Thanks aggie. I hadn't seen a two gasket set up, so I was confused. I guess they just sent the standard ones and the upgraded ones.

[aggie91]

Originally Posted by 1971Stepside

Thanks aggie. I hadn't seen a two gasket set up, so I was confused. I guess they just sent the standard ones and the upgraded ones.

That was my guess that they sent the standard ones and the upgraded ones too.

[62chevy302]

Are the upgraded gaskets gm stock manifold mls gaskets?

[cornerstone]

Originally Posted by 62chevy302

Are the upgraded gaskets gm stock manifold mls gaskets?

I am wondering the same thing. I ordered a set last night and added on the "upgraded gaskets". When they arrive I will post pics of theirs VS. stock GM.gaskets, although I am running a 5.3 LT from a 2014 truck, so they may be different than yours anyway... I dont know what setup you are going with.
Brian

[62chevy302]

Ok i will be waiting on your reply

[62chevy302]

I have a 04 6.0 truck block

[19SIKtySix]

I don't have them installed yet, but for those asking about the gaskets I have a set of the shorty headers from Speed Engineering. Overall they look like quality headers for the price of them. They come with the standard "paper" gaskets and the upgraded gaskets are similar to the OEM style.

[19SIKtySix]

Here's a couple more pics to show the quality of the shorty headers.

[cornerstone]

So the multi layer steel gaskets are a gm product.
Also my headers arrived like the rest...
Did y’all receive header bolts with your purchase? I’m guessing mine fell out of the box if they were in there in the first place.

[cornerstone]

They do fit quite well though.

[Bobbed72]

Originally Posted by 19SIKtySix

Here's a couple more pics to show the quality of the shorty headers.

Attachment 1825665

Attachment 1825666

Attachment 1825667

Attachment 1825668

Attachment 1825669

I got the shorty's on mine also and I notice in your pics different exhaust gaskets. Are those some you threw in the box for safekeeping or did they send those? All I got where the style in the first pic with the clamps.

[crakarjax]

Has anyone used the f-body long tube speed engineering headers on a C10? I have an fbody oil pan and want to find longtubes that don't have below the pan much if at all.