Port direction help

[Miguel Landeros]

So I'm 40 and recently retired from active duty and find myself with the free time to build a system that's from scratch. As a noob, I'm working on stuffing two massive audio mma 124's and a massive audio gtx154 into a 2004 Civic. I want to port the 15 and put the 12's in sealed enclosures. Since it's a Civic there isn't a lot of free space so as the title says I'm not certain if port direction matters? I want the sub centered facing rear can I point the port into the cab of the car?