i have never seen this before so i was wondering if it was possible, and if the car would still be streetable.

 

In simplest terms... Yes & Yes

 

im gonna use a template to port my s5 engine when i get it...

 

why isn't this more common then if it is streetable?

 

Because the engines use 30% more fuel in light load low rev situations, they idle around 1200 to 1500rpm (can be made to idle lower, but very hard) and they in general loose a bit of power compared to a street port at revs below 3000rpm.

If you can handle the noise and these other minor points then go the port, if not then go a street port.

Depends on what you are like and what your situation is.

 

yeah i have a bridge port 12a which i use as a daily drive i really dont have any problems with it it is a little loud for some people and i always smell like gasoilne but other than that it seems to run better than my turbo 2