well, i tought michelin PS3 is very2 good as the noise is lower? in that case, nothing much can be done about that, the most noise pollution for me right now, are coming from bellow(tyres). i still use silverstone M5 at 36000km usage. i dunno if hood+firewall and floor can help that much. we need person which has done complete set up on soundproof in his alza to reviews. 

I never said the PS3s were bad... As a matter of fact it's way quieter and less vibration compared to the SS M5s... But without treatment on floor, firewall, and fender it is still noisy on coarse roads... Nevertheless resurfaced roads are a nice glide on the PS3s, soothing to my ears... Too bad Malaysian roads are not always the case...

Speaking of noise, I also need to tackle the engine noise when it goes above 110kph... That thing struggles when it comes to that speed, so traveling outstation is not comfy on the Alza... 

I never said the PS3s were bad... As a matter of fact it's way quieter and less vibration compared to the SS M5s... But without treatment on floor, firewall, and fender it is still noisy on coarse roads... Nevertheless resurfaced roads are a nice glide on the PS3s, soothing to my ears... Too bad Malaysian roads are not always the case...

Speaking of noise, I also need to tackle the engine noise when it goes above 110kph... That thing struggles when it comes to that speed, so traveling outstation is not comfy on the Alza... 

Yah, stuck at the same situation with XM tyres. Engine noise above 110kph. Aircon also... now I'm thinking should I change, go test drive the new Avanza.

After use of 18K mileage .. still worth to trade in my SS M5 ?? haiz ...

Very loaded to be able to change a new car after what... a year of owning the Alza...?

Thinking of new exora bold Just thinking

Thinking of a vw....

already change all my tyres to 195/55R/15 CC5 for the price of rm215, as i heard CC5 is the noise killer. trade my M5 for the price of rm150-all tyre, distance 38000km. now the soundproof can be maximize but the engine sound still can be heard. engine is ok, can tolerate rather than the sound of the road surface which is annoying as @*#*. i guess i have to put back the original filter, the sound is noiser if with out it, but will sacrifice pick-up if do~

should i do align if change tires? i dunno about this. too long, forgotten already procedure if change tires. however, i'm getting to like my car even more now.

wow .. where u trade in? interested man 

Thinking of a vw....

already change all my tyres to 195/55R/15 CC5 for the price of rm215, as i heard CC5 is the noise killer. trade my M5 for the price of rm150-all tyre, distance 38000km. now the soundproof can be maximize but the engine sound still can be heard. engine is ok, can tolerate rather than the sound of the road surface which is annoying as @*#*. i guess i have to put back the original filter, the sound is noiser if with out it, but will sacrifice pick-up if do~

should i do align if change tires? i dunno about this. too long, forgotten already procedure if change tires. however, i'm getting to like my car even more now.

how much the petrol consume per km?

Finally I change to Continental CC5 195/55/R15 4pcs straight this morning because out of the original tyre (Synergy M5) 2 pcs were "bengkak" which will blow anytime and another 1pcs was hitted with screw. My car mileage is about 34k as now, the tyres tread were about 50% left.

Review of CC5 (compare with Synergy M5)

Noise
- It is a very big improvement.
- On highway, the music sound (USB) can still be heard even the volume is 5 at the speed of 110kph. The music slowly unhearable after 120kph, mainly covered by the wind sound of side mirror and engine noise.
- In town driving, the sound impact from uneven roads/bumps is greatly reduced, no more "batu" feeling.
- No more tyre rubber sound in shopping complex parking.
- When the car is not moving, no visible tyre noise when turning steering.
- Now engine noise is the most visible sound.
- On the other hand, steering rack vibrate still persist.

Performance
- Pickup not as good as Synergy M5 but very close, due to size 195/55/R15. (I don't mind for the sake of comfort )
- On dry road, suprisingly it is not as grippy as Synery M5 when speeding above 130kph, maybe it is still new. Keep in view.
- Haven't really tested cornering, but sidewall seems softer, may not as zippy as Synergy M5. Keep in view.
- Haven't tested wet performance, it is not raining today
- On the other hand, speedo meter change to slightly slower by 5-10kph (means actual speed faster).

Summary
- It is well worth if what you want is a more comfort drive

My XM2 starts to become noisy already.