You would be wasting your time and money.  The engine was never designed to withstand the boost and the drive train was never designed to handle that kind of horsepower.

Posted by: @digvijay

im planning to boost it to 300hp on stock engine and components

Is this the same vehicle and engine which had blown its head gasket and was repaired with resulting lack of power and was previously modified to run on CNG? 

And now you want to double the bhp rating on the above mentioned internals?

You'll probably twist the connecting rods into pretzels and burn holes in the pistons unless maybe the head gasket blows first. If that's what you're after, go for it.

You are going to seriously blow the engine up especially keeping the internals stock.  The CR-V is the wrong platform to be trying to extract more power from.

Posted by: @digvijay

The car engine is 100% fine and new

Then budget for a transmission rebuild/replacement because that’s the next thing which will fail, prematurely.

With all due respect, I don’t know who’s been giving you car advice, because it seems they are building you castles in the sky, with the sole objective of wanting you to pay $$$ for nonsensical modifications.

The Honda 2.0L is already adequately powered in a CR-V, even in the hills, and if you claim the engine is in ‘like new’ condition, then you shouldn’t feel any lack of power.

If your goal is to modify/soup up the engine, then I’m afraid, like others have mentioned, you’ve simply chosen the wrong vehicle. In a Civic, sure, but in a CR-V..?!

What if i say that we have shown the car to honda dealers and testing the car engine , it was found that engine is in new comdition , no cng problem no head gasket problem . The car engine is 100% fine and new. Then what will be your opinions ? 

The answers mentioned by other members do apply no matter if it's new or used.