QUOTE(ESP156 @ Jul 25 2012, 02:34 PM)
Bro can u explain more what product did u apply on the wheel arch ? coz i am tempted to go for STP magic for noise reduction.
for My case, i find changing to a good tyres really help, i replaced the stock toyo to Goodyear F1A2 and the cabin noise reduce tremendously.
2ndly i suggest to check the rims and balancing as well, for my case, i felt further noise reduction after fixing crooked rims (was told very minor) and ensuring all rims are in proper balancing.
Hi,
For the benefit of members here, let me give share the details of what I have done and spent to try to cut the tyre/ road noise:-
Money Spent:-
1) Application of "QuietDrive" on all 4 wheel arches (grey thick paint stuff that deadens noise- apparently adopted from the US Navy stealthboat technology) - RM1,000ish
2) Boot Treatment (Same QuietDrive but in the form of sticker on the whole boot, boot lid as well as under the back seat) - RM1.2Kish
3) Autofoaming the chassis " Comfort Package", Autofoam the 2 A pillars and Dash Treatment (i.e. some cloth damping stuff put into the Dash) - RM1,000ish
Effects of the Above:-
1) Quietdrive on wheel arches - No difference IMHO
2) Boot Treatment - No difference IMHO
3) Autofoaming the chassis - Better ride over uneven roads, bumps. The Dash Treatment and A Pillars autofoam did reduce some road noise. (ard 10-15% IMHO)
Btw, all the treatments (in the order above) was recommended by the Autofoam boss. He said he will call me when the "Roar Buster" material is in stock (dont know will charge me or not) as I think he also realizes just minor improvement only when I went back to remove the foam and he drove the car.
Sigh

I was really hoping that KL Auto can at least reduce the tire/ road noise at least 40-50% . Looks like only left some hope on the Roar Buster and changing tyres maybe a year down the road. I travel long distance on the NSE frequently thats why I was willing to spend the $$$ to reduce the noise.