A 4X4wd electric RC is required for drifting. If racing tyres also available, the i will buy them too. the scale can be 1:10 , 1:16. If price below 4k, then it'd be awesome 

4k and racing tyres ?
Increase your budget if you want atleast a car which is RTR

well, i found an RTR below 4k. how much do racing tyres cost?

hpi makes drift tyres that cost about 1000 bucks without the rims...
http://www.maxspeedtechnology.co.uk/arc-angle-tyre-super-soft.html
if you want tyres pre-glued, they're going to be a lot more. what car are you using them on?

googboog, i am yet to buy one. But i have this one in mind
http://hobbyking.com/hobbyking/store/__20616__1_18_Scale_4WD_RTR_On_Road_Drift_Car_red_.html

As customs is the problem , i am looking for an indian supplier.

Ah yes, I've seen this car before. It's good and is decently priced
Don't know about changing the tyres though, the ones it comes with should be enough.

I don't think customs will be a problem for a toy under 4000/-
I've bought more expensive things and not had to pay a single rupee. On the other hand, I have heard of stories of things of lower value being held back for no reason.

I also read things about customs not giving these toys. Thats what i am scared of. If what you say is true , then i will order it tomorrow.