Powdercoating Exhaust Manifolds Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Already Gone** · 08-25-2021, 12:47 PM

Has anyone had their rams horn exhaust manifolds powdercoated and if so has it lasted.

k2rm · 08-25-2021, 04:44 PM

My ram horns were powdercoated about 12 years ago. The color is definitely duller than new and there is some rust spots on the right, but they may clean up a bit if I tried.

**YellowK5** · 08-25-2021, 05:56 PM

Look into Jet hot coating..great for exhaust system parts

Caddylackn · 08-25-2021, 07:01 PM

This stuff is supposed to be great for cast iron manifolds:

https://www.eastwood.com/calyx-manif...ting-3-oz.html
I haven't used it, but have seen many rave reviews on forums of this product.

It is a dressing so it needs to be reapplied every few years or so. It will not reduce heat temperatures though like powder coating, but it will not chip off or scratch if you have to take off your manifolds or pull your engine. If it does get scratched it can just be reapplied and good as new again.

**1968C30** · 08-25-2021, 08:27 PM

Not powder coated. I sprayed these with dry graphite spray. Supposed to wear off and just reapply with a rag.

**dagnabbitt** · 08-25-2021, 11:19 PM

I just used an Eastwood coating on some corvette manifolds. Works great, looks great.

If you don't reapply it after several years it doesn't peel or wear off, it just turns white: it still adheres and protects.

I guess it depends on what look you are going for, some people are particular about these things.

Zeroman · 08-26-2021, 09:21 PM

I had my exhaust manifolds ceramic coated. They are both right side Corvette manifolds.

I have been very pleased with the results.

If you do this make sure the shop that does the work properly preps the cast iron. If it is not done properly the cast iron will allow corrosion to weep through from the inside of the manifold and discolor the coating on the outside.

Polymer Dynamics in Cypress, TX did mine.

**Already Gone** · 08-26-2021, 09:38 PM

Quote:

Originally Posted by Zeroman

I had my exhaust manifolds ceramic coated. They are both right side Corvette manifolds.

I have been very pleased with the results.

If you do this make sure the shop that does the work properly preps the cast iron. If it is not done properly the cast iron will allow corrosion to weep through from the inside of the manifold and discolor the coating on the outside.

Polymer Dynamics in Cypress, TX did mine.

Actually found a place in Calgary that does the ceramic coating and called yesterday and will be sending mine there to get done.

08-25-2021, 12:47 PM	#1
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,148	Powdercoating Exhaust Manifolds Question Has anyone had their rams horn exhaust manifolds powdercoated and if so has it lasted. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

08-25-2021, 04:44 PM	#2
k2rm Registered User Join Date: Aug 2009 Location: Concord, CA Posts: 147	Re: Powdercoating Exhaust Manifolds Question My ram horns were powdercoated about 12 years ago. The color is definitely duller than new and there is some rust spots on the right, but they may clean up a bit if I tried. Attached Images

08-25-2021, 05:56 PM	#3
YellowK5 Active Member Join Date: Jun 2021 Location: Rancho Cucamonga California Posts: 170	Re: Powdercoating Exhaust Manifolds Question Look into Jet hot coating..great for exhaust system parts

08-25-2021, 07:01 PM	#4
Caddylackn Registered User Join Date: Jun 2016 Location: Bremerton, WA Posts: 171	Re: Powdercoating Exhaust Manifolds Question This stuff is supposed to be great for cast iron manifolds: https://www.eastwood.com/calyx-manif...ting-3-oz.html I haven't used it, but have seen many rave reviews on forums of this product. It is a dressing so it needs to be reapplied every few years or so. It will not reduce heat temperatures though like powder coating, but it will not chip off or scratch if you have to take off your manifolds or pull your engine. If it does get scratched it can just be reapplied and good as new again. __________________ 1969 Custom Camper C20; Factree Air, 350/TH400/Dana 70U with C30 wheel cylinders, Disk brakes, H4 conversion, headlight relay mod, 3G 135 amp alternator. 7500 GVW

08-25-2021, 08:27 PM	#5
1968C30 Senior Member Join Date: Jan 2012 Location: Mt Nebo WV Posts: 1,339	Re: Powdercoating Exhaust Manifolds Question Not powder coated. I sprayed these with dry graphite spray. Supposed to wear off and just reapply with a rag. Attached Images __________________ https://paypal.me/DMorris6870

08-25-2021, 11:19 PM	#6
dagnabbitt Senior Member Join Date: Dec 2014 Location: Edmonton Alberta Posts: 1,465	Re: Powdercoating Exhaust Manifolds Question I just used an Eastwood coating on some corvette manifolds. Works great, looks great. If you don't reapply it after several years it doesn't peel or wear off, it just turns white: it still adheres and protects. I guess it depends on what look you are going for, some people are particular about these things. __________________ DAVE Edmonton, Alberta 1959 Apache 1967 K20 1968 C20 1970 C10 1972 GMC 2500 1981 C10 Last edited by dagnabbitt; 08-25-2021 at 11:24 PM.

08-26-2021, 09:21 PM	#7
Zeroman Registered User Join Date: Mar 2013 Location: Houston, TX Posts: 348	Re: Powdercoating Exhaust Manifolds Question I had my exhaust manifolds ceramic coated. They are both right side Corvette manifolds. I have been very pleased with the results. If you do this make sure the shop that does the work properly preps the cast iron. If it is not done properly the cast iron will allow corrosion to weep through from the inside of the manifold and discolor the coating on the outside. Polymer Dynamics in Cypress, TX did mine. Attached Images



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