I know in the summer, the lid off will cause heat soak and less mpg's.

How does it effect gas mileage in the winter?

Will it help heat up the engine faster?

How does the lid off effect the car in cold temperatures?

thanks

 

 

Why is this a fail and what have you contributed?

Its a serious question that I'm curious about.

A yes or no would be nice

 

Keep the lid on all the time.
Even in winter,underhood temp.goes up pretty high...

 

ok thank you.

i would have left it off, but just got a greddy tic and i cant hear the intake anymore anyways! haha


nfr ftw!! im digging the cf as well.

 

I personally don't think it makes any difference.