The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

GMJimmy · 01-23-2021, 12:35 PM

Thanks Mike and ChevyRacefan for the replies. This isn't a drone but more of an engine roar combined with wind noise. I realize these old cabs aren't air tight. At 70 MPH it runs at about 2100 RPM so not screaming. I just thought the long tube headers might be the issue. I might try some dynamat insulation under the carpet and firewall.

01-23-2021, 12:35 PM	#5
GMJimmy Registered User Join Date: May 2004 Location: Ontario Canada Posts: 164	Re: Exhaust decision, opinions? Thanks Mike and ChevyRacefan for the replies. This isn't a drone but more of an engine roar combined with wind noise. I realize these old cabs aren't air tight. At 70 MPH it runs at about 2100 RPM so not screaming. I just thought the long tube headers might be the issue. I might try some dynamat insulation under the carpet and firewall.