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73-87 Chevy _ GMC Trucks => Performance => Exhaust => Topic started by: GreenK30 on March 02, 2018, 08:50:56 PM
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How much more cabin noise should I expect when running headers vs factory cast exhaust manifolds?
I'm thinking of using these headers on my 454 K30 if that makes a difference:
https://www.summitracing.com/int/parts/hok-2463hkr/overview/
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Welcome to the site
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Thanks bud. :)
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It's going to depend more on where your exhaust ends and if you're running a cat, resonator or muffler.
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I'll run the exhaust pipes full length, and exit like the factory. Mufflers only. I want to keep it quiet, factory like.
I've read that OEM cast iron exhaust 454 manifolds are restrictive, and one of the best mods for a 454 is to put headers on.
Any thoughts appreciated.
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I would recommend high quality headers with a heavy duty finish. Cheap headers are noisy and rust quickly. Big blocks need to breathe to perform well so I can agree with ditching the manifolds but I wouldn't for those ones you linked to.
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How much more cabin noise should I expect when running headers vs factory cast exhaust manifolds?
I'm thinking of using these headers on my 454 K30 if that makes a difference:
https://www.summitracing.com/int/parts/hok-2463hkr/overview/
I used a set of Sanderson BB8 headers on my c30. They're a little spendy but I'm very happy with the fit and quality. With full dual exhaust the tone changed a little in the cab, but the noise level is about the same as it was with the stock manifolds.
Sent from my A0001 using Tapatalk
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I'll look into what my other options are. I see the Sandersons mentioned and LandL products as well.
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I have been running a set of the headers that you linked to for 20+ years now........see my monster truck build thread. I reinstalled them after sandblasting them and put a ceramic paint back on.
If you can get those Hooker headers with a quality coating I think you will be satisfied. I love mine......even when they were rusty.
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You should buy them already coated or have them coated after you test fit them as they are best coated when new, not rusty and they rust very quickly. Years ago i had a set of headers coated that had been run on the truck for about a year. They are in a pile in my truck and I can show you what they look like now. Stainless is another great option to go with and you can get them ridiculously cheap on eBay, just search stainless headers bbc
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Also take a look at Hedman Elite headers, which have thicker tubes and thicker flanges that hold up better.
Bruce