Re: Speed Engineering LS Swap Headers Findings
 

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. :lol:

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

They are 3/8" flanges.

Re: Speed Engineering LS Swap Headers Findings
 

Awesome! Thanks!

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

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,

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

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

:lol:

Re: Speed Engineering LS Swap Headers Findings
 

Are the upgraded gaskets gm stock manifold mls gaskets?

Re: Speed Engineering LS Swap Headers Findings
 

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

Re: Speed Engineering LS Swap Headers Findings
 

Ok i will be waiting on your reply

Re: Speed Engineering LS Swap Headers Findings
 

I have a 04 6.0 truck block

Re: Speed Engineering LS Swap Headers Findings
 

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.

Attachment 1825663

Attachment 1825664

Re: Speed Engineering LS Swap Headers Findings
 

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

Attachment 1825665

Attachment 1825666

Attachment 1825667

Attachment 1825668

Attachment 1825669

Re: Speed Engineering LS Swap Headers Findings
 

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. :waah:

Re: Speed Engineering LS Swap Headers Findings
 

They do fit quite well though.

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

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.

Re: Speed Engineering LS Swap Headers Findings
 

I used the C10 long tubes and have the CTS-V pan and the headers do not hang below either the engine or transmission pan. Using POL engine stands.

Re: Speed Engineering LS Swap Headers Findings
 

Hmm ok the f-body pan is 1" shallower than the cts-v. Based on your pics it does look like they would hang below the f-body pan unfortunately.

Re: Speed Engineering LS Swap Headers Findings
 

Ah, I thought both pans were the same depth but the F-body was deeper toward the front of the pan. My mistake. You are right, you would be about even to a little below the pan.

Re: Speed Engineering LS Swap Headers Findings
 

Whose engine stands/mounts did you use? Thinking of doing the same on one I am putting together...

Re: Speed Engineering LS Swap Headers Findings
 

I had to order a set after this thread, for $300 bucks why not? The drivers side flange was just a tad warped but the gaskets should seal up just fine.

Stupid question... are they supposed to be offset like that? I find it weird that they do not meet "even" at the back.

Also a close up pic of the drivers side where the header comes REAL close to a casting on the block.

Re: Speed Engineering LS Swap Headers Findings
 

Mine are close at that protrusion on the block, too. Also pretty common for header collectors to be staggered, depending on the design. Part of it is the offset of the cylinder banks, amongst other things

Re: Speed Engineering LS Swap Headers Findings
 

I bought a set of the shorty headers for my truck.

Here are the pictures of the passenger side. It is TIGHT! I do not have gaskets in yet as this is just mockup. The v-band cannot be removed without loosening the manifold bolts. I need to check it with gaskets. That's a bummer if not. The collector is damn near touching the block. A clearance hammer may fix this. Runners 4 and 6 are touching. A little pry may loosen up this tolerance.

Overall, for $149 bucks, I can't really complain. If I have to massage them a little, I am ok with that.

Re: Speed Engineering LS Swap Headers Findings
 

Driver side. No gaskets installed yet. #1 primary is touching the block. Again, this can be clearance easy enough. V-band clears no problem.

Re: Speed Engineering LS Swap Headers Findings
 

I used the speed engineering ram horns and had no problems with clearance.

Re: Speed Engineering LS Swap Headers Findings
 

Yes, they hang a bit below the F-body pan, but they're still about even with the trans pan.

https://i.imgur.com/KYIldcpl.jpg

Re: Speed Engineering LS Swap Headers Findings
 

Thank you, super helpful info as I think they'll work for me if they are at least even with the trans pan!

Re: Speed Engineering LS Swap Headers Findings
 

I have a 1976 Blazer 2 wd. Lowered 5/7.

Installing LS3/6L80e. With Tejas mounts.


Is there a reason to go with long tubes or shortys or mid length? and why?

Re: Speed Engineering LS Swap Headers Findings
 

Long tubes = more power and torque. Mid length are a compromise when LTs don’t fit. Shorties are a waste of time; all of the bad (heat, potential leaks/fitment issues, etc) with no real benefit over manifolds. It’s all about your priorities: power, looks, clearance, cost, ease of install, the list goes on...

Re: Speed Engineering LS Swap Headers Findings
 

Did everyone use the front holes or rear holes for your engine stands? I have the performance online tube stands with sliders and mounted in the rear frame holes. Engine slid all the way forward. The long tube 1 3/4 hit the clam shell design mount on the driver's side. Looks like I'm going to have to move my stands to the front frame holes and slide the engine back instead so they clear the driver's side...

LM7 5.3 motor
POL tubular engine stands
POL engine slider mounts(clamshell)
Speed Engineering 25-1025 long tube headers


:chevy:

Re: Speed Engineering LS Swap Headers Findings
 

Bueller...

Update. I slid the engine all the way back, my block adapters have the 2" slides. This worked to get the headers to clear the clamshell motor mount on driver's side. However I'm worried I might not have the cab clearance if I don't move my engine stands to front frame holes. My new stands cause me to drill new holes in cross member if I move them to front holes. Plus my stock truck oil pan may hit I dunno, it's gonna be close...

Re: Speed Engineering LS Swap Headers Findings
 

I put my POL stands in the front holes on the frame.

Re: Speed Engineering LS Swap Headers Findings
 

Has anyone used the Speed Engineering Headers with an SM465 2wd? And does the C10, C20 and C30 all have the same clearance for headers? I see a lot of C10 swap headers, but I don't see anything for C30.

Re: Speed Engineering LS Swap Headers Findings
 

Wow that looks awesome

Re: Speed Engineering LS Swap Headers Findings
 

I can confirm the LT's will fit a C30, but not with the SM465 external push-type slave cylinder.

I just installed mine, passenger fit like a charm, no problem. Gives plenty of room for the starter too.

Driver side headers hit the slave cylinder. If the slave was 2" shorter in length, I think they'd fit. It'd be super close, but they'd bolt on.

Re: Speed Engineering LS Swap Headers Findings
 

I had to go with the speed engineering ram horn headers for my 65 c10 as all of the others hit my external slave cylinder. The ram horn headers drop down nice and avoid everything. The exhaust guy will have to finish it off.