Value question: OEM manifolds or shorty headers?

[j91z28d1]

These look neat.

Summit Racing SUM-910123 Summit Racing™ Split Lock Bolt Kits | Summit Racing

Free Shipping - Summit Racing™ Split Lock Bolt Kits with qualifying orders of $109. Shop Header Fasteners at Summit Racing.

www.summitracing.com

I have a set like that on my older sbc. they do work but I like studs better if given the choice.

 

[j91z28d1]

Dorman Products - 03411

Exhaust Manifold Mount Hardware - M8-1.25mm

www.dormanproducts.com

 

[strutaeng]

I used the Dorman on my 99 Silverado, installed like in 2019. They seem to be holding up good so far.

And installed some Summit Racing ones on my 06 Suburban last year, although not the ones on that link.

Regarding your question, can't you just install some junkyard/part-out special exhaust manifolds? There's a flatness spec you can check. Paint them with some high temperature paint if you want, until you buy whatever you want to run. The factory ones actually flow pretty good.

I'm actually thinking of removing mine to paint them just for fun. I've never painted exhaust manifolds before though.

 

[mikez71]

These look like they'd work.

Dorman Products - 03133HP

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

www.dormanproducts.com

^^ X2 ^^

Same part number I bought, but without the 'HP' (03133) Not stainless.
So kinda hoping the M10 - 1.50 is the right thread size!

 

[Charlie207]

^^ X2 ^^

Same part number I bought, but without the 'HP' (03133) Not stainless.
So kinda hoping the M10 - 1.50 is the right thread size!

The LY6 cylinder heads I have use M8 x 1.25 thread pitch for the exhaust manifold bolts.

Again, I'm not sure why the Dorman website says that M10 x 1.5 fit LY6 heads, because that's wrong.

 

[Charlie207]

Dorman Products - 03411

Exhaust Manifold Mount Hardware - M8-1.25mm

www.dormanproducts.com

Thanks!

Do you put thread locker on the threads in the head?

 

[j91z28d1]

Thanks!

Do you put thread locker on the threads in the head?

I did not.. sometimes it's nice to be about to screw them out. theses also have a 6.5mm hex part to screw them in and out of needed.

 

[j91z28d1]

I honestly don't know what our truck dipstick looks like but here's the only tight part I had. I had the dipstick out when I put the headers(well manifolds but headers to me compared to stock) in. it was a bit of bend and or wiggle around to get in between. but no real issue

 

[Charlie207]

Ordered those Dorman studs from Scamazon. Fingers crossed there's at least Spanish on the box.