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73-87 Chevy _ GMC Trucks => Performance => Exhaust => Topic started by: GreenK30 on March 02, 2018, 08:50:56 PM

Title: 454 headers noise level in cab?
Post by: GreenK30 on March 02, 2018, 08:50:56 PM: 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/
Title: Re: 454 headers noise level in cab?
Post by: Rapid Roy on March 02, 2018, 09:23:29 PM: Welcome to the site
Title: Re: 454 headers noise level in cab?
Post by: GreenK30 on March 03, 2018, 05:32:27 PM: Thanks bud. :)
Title: Re: 454 headers noise level in cab?
Post by: Irish_Alley on March 03, 2018, 07:01:51 PM: It's going to depend more on where your exhaust ends and if you're running a cat, resonator or muffler.
Title: Re: 454 headers noise level in cab?
Post by: GreenK30 on March 03, 2018, 07:20:40 PM: 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.
Title: Re: 454 headers noise level in cab?
Post by: VileZambonie on March 04, 2018, 07:49:48 AM: 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.
Title: Re: 454 headers noise level in cab?
Post by: RossVE on March 05, 2018, 10:21:12 AM: Quote from: GreenK30 on March 02, 2018, 08:50:56 PM
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
Title: Re: 454 headers noise level in cab?
Post by: GreenK30 on March 05, 2018, 07:47:04 PM: I'll look into what my other options are. I see the Sandersons mentioned and LandL products as well.
Title: Re: 454 headers noise level in cab?
Post by: Engineer on March 05, 2018, 08:59:45 PM: 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.
Title: Re: 454 headers noise level in cab?
Post by: VileZambonie on March 06, 2018, 05:13:57 PM: 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
Title: Re: 454 headers noise level in cab?
Post by: 75gmck25 on March 23, 2018, 06:27:19 AM: Also take a look at Hedman Elite headers, which have thicker tubes and thicker flanges that hold up better.

Bruce