quick questiom
 

what makes the 13b go brap brap brap... lol i know its a noob question but i wanna know what makes it do that and is it performance oriented because i hear some sound like that and others (like mine) sound smother... i love the brap lol thanks guys.

High overlap porting such as huge "street" ports, bridgeports, j-ports or peripheral ports.

thank you... i wanna rebuild my N/A S4 and i wanna port it but dont want to go overboard is a huge street port be worth it ir would a mild bridge port be good enough i dont want to go to big cuz for now it needs to be street legal

How much power are you looking to get?

In most cases, huge intake ports on the 6 port engines aren't going to help you a lot on the street. They will make high peak power up in the rev range. A lot can be done with a stock ported engine (don't pull the engine apart just to port it), and a conservative street port is a nice way to go.

well my plan is to tune it to auto X and drift a little bit and it needs a rebuild anyway and i figured since im replacing the seals i might as well port it.... oh and it smokes when the engine rpm slows down and when i shift it puffs a little bit.... i have no cats and generic mufflers its a N/A S4, i have been told that it might be oil rings or the oil injectors get stuck open or the metering pump is pumping to much oil... and i know for you to get a full understanding of whats going on you have to see it i could post a video if that would help. any ideas? its a light tinted blue smoke... sometimes its really blue though.

Probably worn oil o-rings. Since it is apart, then a good street port (use a known template like the one available from Mazdatrix/RB) is a good way to go.