KL Gtvi. On long trips exhaust drone between 2000 and 3000Rpm was driving me crazy.

After a lot of reading and and sitting in the rear seat on a recent 2 hour drive this is what I worked out.

Exhaust noise enters car through right hand air outlet behind (side of)rear bumper. It then travels up through hollow between boot floor and guard, behind the boot trim (which has a large air gap behind it) and up through the C pillar which is like a large echo chamber. Result "drone"

Purchased a 3mm sheet of mdf from bunnings. Cost $3.00

Pulled back right hand side trim in boot. (Drivers side) using a piece of cardboard made a template to fit gap in floor of boot making sure it extended as far forward as the wheel arch.

Used template to cut out pice of Mdf to fit.

Used existing single screw used to hold bottom of side trim to the floor to screw it into place.

Replaced trim and went for a drive out on the highway.

Drone has disapeared. Still hear exhaust growl when you put your foot on it but loudest noise in the car now is low profile tyres on course bitumen.

To prove to myself it wasn't the "placebo" effect took a mate who has been critical of the exhaust drone in the past for a drive. He couldn't believe something so small could make such a big differerence.

For those of you with the factory sports mufflers who want the car sounding more refined inside this is defininately worth $3.00 and half an hour of your time.

Cheers

I find it hard to believe a 3mm piece of MDF would do that... But hey, if it works then good for you.

you could probably just use a rag stuffed in there.

How's the cabin ventilation now?

Drove 450 klms on a 30d day over the weekend.

No problems

i done a sililar thing on my second gen, becaus the sub rattles this, but the i had moisture in the boot, so i took it out and just used some of that tape with the foam stuff to stop the rattles

*runs outside to try it now*


thanks for the tip!!!


if it makes 1db difference you are the man!!

i have the quitest mufflers can get now, and thats it.....!!! nothing more i can do.... :(

my exhaust drone is terrible at certain rpm it cancells out the subs!!

but from outside the car it isnt loud at all really, just my muffler/tip positioning...

Any chance of pics?

Wife has the car today.

Will take pics and post tomorrow,

Cheers

This is exactly the sort of innovation that's of great use to us, thanks for sharing :thumbsup:

Will probably give it a go myself, when I get around to it.

No probs!

yep great stuff, but in 2 weeks time 10 members die from lack of ventilation in the cabin causing carbon monoxide poisioning....

or slam the drivers door and the passangers windows falls out :bowrofl: cos there is no where for the air pressure to go lol


but seriously im out there now in the garage seeing what i can do there.... sounds like a good idea, suppose i could always just open the window so i dont die lol ;)

but seriously im out there now in the garage seeing what i can do there.... sounds like a good idea, suppose i could always just open the window so i dont die lol ;)
Hahahaha
or you could just not close off the hole the whole way so theres still some ventilation but reduces the noise? I'm gonna be trying this real soon

Not an air tight seal and still ventilation on left hand side of car.

Interested to hear peoples verdict on this.

Cheers

still waiting for the pictures.

so what's the quietest muffler out there these days. from what I've heard lukey and berklee are the best.

but I'm definitely gonna do this mod when I'm sober again hey. my car drones like a b#%*h.

What about wagons? I get the same annoying drone.

just did it!

sorry no difference for me! maybe worse if anything


less of a difference than having your arm rest up in the rear!

may work fo some but i have more powerful drone ;)

thanks andrewd. might try it might like you said. i have a pretty powerful drown :p

thanks andrewd. might try it might like you said. i have a pretty powerful drown :p

haha drunk :P

:D Interesting to see totally different results - similar to some other kits what ppl have installed. Great innovation and I will certainly check this one day - the shiny XForce is a tad noisy boy at 1800-2000 RPM.

haha. yerr. i was a bit when i wrote that.

ehh. i was half way there.

gonna replace my cannon with dual lukey's i think. or just single. not sure.

afraid dual lukeys will be 2 loud, and dont want it droning again.

Thanks for the great tip. If this works it will make me a very happy chap.

Whenever you can, please post some pictures documenting what you did.