My car has 265HP stock. I have heard that changing out the stock air filter would help with the HP. K&N seems to be a popular brand? Having twin turbos, would i need two? I do intend on chipping but found this intriguing.

 

it's a single panel air filter, just swap it in your airbox and you're good. they're about $45 for the k&n.

 

Any idea if it should affect performance and if so how?

 

There are # of ways the get the most of your car.

What would be a typical driving (condition) for you?
What would be an extreme driving (condition) for you?

 

NO impact... you'll feel no difference.

 

mine seems to run a bit better, a very very small improvement on fuel economy, ive noticed a lil nudge in power