The best is to mod after warranty. Haha. Air filter won't affect warranty so never mind.
Exhaust system warranty is one year so basically can mod it after one year.
If you want recommendation, I will say that since your car is new, dun go for performance first.
Go for some ICE and Soundproofing.
Try to drive for some time and push your car till you can control your car 100% when you whack it. Get to know the car characteristics more such as the timing for throttle lag, the braking distance, the cornering angle and speed before your tyre start to screech and lose grip. Only after that you will see more significant improvement to your mods and can see how different is the mod before and after.
It is really recommended to go for safety. Mod better brake. A higher temp brake pad can shorter braking distance by a margin that really make a lot of difference.

added into member list...
then u go PG mod la...or u can b like jasonloh7906 purposely pass by KL to do some heavy mod then go back up north lo...he comes from the south... mod scene all in PPEOC...perhaps u can join the PPEOC northern crew...

The last time I asked EA, Mytheo LCP was RM550 including installation.

I would recommend Mytheo due to additional rubber in the middle for vibration absorbation and prevent harmonic resonance damage if you ever reach that type of high rpm.

At Bukit Jalil. Can go google EA Autoworks to find it. Or at FB.

At Bukit Jalil. Can go google EA Autoworks to find it. Or at FB.