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Sound deaden your boot panels / number plates to stop vibrations and panel flex. Also should do your doors too.

Look up products like Dynamat, G-Spot Serenity, etc.

//Edit: Read this link from FHRXStudios about deadening.

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Its a bit messy, well a lot messy, but I like to use underbody tar, costs less than $20 for a litre tin and you can just smear it on all over the inside of your doors, works a treat. Grab some rubber gloves and tape some plastic bags up the length of your arms, if it gets on your skin its a bastard getting it off. I would still grab some matting for the boot tho just for asthetics sake...

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Dynamat Extreme is awsome stuff. i really recommend it, although it isnt cheap. i put almost a total boot kit on the VS (it is a commodore, theyre designed to vibrate to bits :() and a wedge back on the boot. it sounds a million times better and hardly any rattles except for the outside door handle :)

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Turn the music down... no just kidding...

Yeah sound deadening works a little bit, but its normally connections that will cause the problems...

the number plate, sections where a body kit touches other pannels... all those sorts of this... You can get a foam which is kinda like shaving cream with a nozzle like on WD40 and other degreasers to get into sections like that, and it goes stiff and can reduce some rattles... But I would only do this if you dont ever plan on removing any of those sections later...

- Crimpage

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