Does header wrapping really help cut noise?
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Thread: Does header wrapping really help cut noise?

  1. #1
    Moderator Array TeeTee's Avatar
    Join Date
    Feb 2002
    Out to pasture in the 'Wack
    04 Kawi Z1000,

    Does header wrapping really help cut noise?

    We've had a few folks that are dubious about the amount of noise that can come from the headers and question the need to wrap the headers.

    I'd like to share a little story of my own from a few years back that may help some of you understand why we are asking for this.

    It was on my old Honda CBX. As it came to me there was an old Macs full exhaust system on it. This thing was NOISY! It also hung down like a broken wing and I found myself dragging the headers a couple of times.

    The old stock pipes had come along with the deal so I cut off the very rusty mufflers and made up an adapter so I could use the stock headers with the Macs mufflers. The Macs headers were single layer tubing with a very thin wall. The stock Honda headers were a double wall design to help keep the chrome from blueing.

    Even with NO change to the noisy muffler I was amazed at how much quieter the header swap was. Just adding the second tubing layer to the headers reduced the noise by a dramatic amount. Now I know the stock headers also were more restrictive but frankly I didn't notice a big change coming out the tail until I did some mods to tha actual muffler. The noise that went away was the sharp metallic ringing sound that apparently was coming through the thin wall headers. Best of all is that the noise that was close to being painful up close when revved was reduced to where it was just annoying.

    Yes this IS highly UNscientific but it does point out that the thin metal of many headers lets through a surprising amount of sound energy. Adding the header wrap can only help to damp this noise.
    A backyard mechanic without a service manual is just like a hooker without a lamp pole.... they are both in the dark.

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  3. #2
    Registered User Array thrills's Avatar
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    Mar 2003
    In an effort to make my race bike quieter, (BEFORE all of this came about i might add!!) a few months ago I wrapped the headers on my 01 gsxr6. They are Hindle Street headers, with a hindle race slip on.

    The addition of hi-temp silicone to the joint, and header wrap from the motor to the can, reduced the noise a significant amount. Even at idle the bike used to sound like a jet, now its VERY subdued. Well, it was anyways, we'll see how the stock system turns out.

  4. #3
    Registered User Array beaterdx's Avatar
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    Feb 2004
    husqvarna 510 smr
    as i know it, thats a byproduct of why people wrap their headers/exhaust. its more to keep the exhaust hot which allows it to flow out quicker. thus adding hp.

  5. #4
    skcorpion Array skcorpion's Avatar
    Join Date
    Apr 2004
    Maple Ditch
    '04 SV1000S
    The only time you could hear my bike was when it was in the higher rev range.....

    We'll see how it sounds after I get everything done (still need to complete the insulation on the lower fairing).......
    A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort." - Herm Albright, 1876-1944, Author

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