Thanks for the very detailed feedback & yes mine is a EK3. i have been doing some research for the passed 2 weeks (google, google, google) and one of the most common areas mentioned in almost every article regarding vehicle sound deadening was the doors. so today i went to P#tco & got their sound deadening material applied for the front doors and guess what.... there is a noticeable improvement in the noise insulation coming from the outside... the engine noise is almost the same (i think the firewall needs to be done up for it to reduce) but the road noise & noise over pot wholes, rough roads has reduced by a noticeable amount. it cost me 3300 LKR ( 3 packets, each packet has 2 sheets. ). i'm thinking of a DIY for the other 2 doors. only thing is the guy @ P#tco used a heat-gun to stick the material better on to the door panels... but i think i should be able to manage as the sheets are like a sticker with a adhesive surface one one side....
I would certainly recommend it to anyone thinking of Sound Deadening.... only downside is if someday you need to do any repairs to the door (shutter, wiring ...etc) then you will have to spend some extra time getting the SD material out :-)
So far so good... i will keep you guys updated of the progress.......next is getting the floor panels.. don't think i'll use the same material...doing more research on that as well......
P#tco has another product from USA which is very expensive... 1 sheet is abt 5000LKR and it's abt twice the Sq Ft of the above ones i used for the doors.... but this is very thick & mostly used for the car floor... NOT GONNA USE THAT way too expensive
Thanks everyone for all the feedback and advice..... if you guys come across any info please update this thread....