Custom exhaust bore size

Thinking of getting a custom system made up, what's the preferred size bore for a n/a? I've done a search but didn't find anything!

Turbo is a possibility in the future so I want a compromise between the two.

I'd go with 3" if you're planning to go turbo and not wanting to swap it out later.

There was a thread on this last week http://www.mkivsupra.net/vbb/showthread.php?307197-help-with-exhaust-pipe-size-s

Good luck getting a definitive answer

Wait and buy a 4" when you go Turbo.

I went 2.5" then wanted to go bigger when I went boosted. A nightmare selling and removing exhausts just for the sake of it. Save up and get it done properly when the times right.

If you get a 3" then decide not to go NA-T you will regret it because you will notice the difference, otherwise 2.5" for NA.

If you go 3" or bigger you will need to silence it big time! It it will rasp it's arse off.

2.5" is perfect if your staying na, no bigger, no smaller.

Ideal set up is race manifold, no cats, middle box and back box. (I've tried everything and this is the best)

If you go 3" or bigger you will need to silence it big time! It it will rasp it's arse off.

 

2.5" is perfect if your staying na, no bigger, no smaller.

 

Ideal set up is race manifold, no cats, middle box and back box. (I've tried everything and this is the best)

Where did you get your manifold from?

I'm actually trying to reduce rasp and drone! I've got a Chris Wilson first decat, second cat is still there, and the stock twin pipe rear section with no boxes, and a blitz nur spec s back box, I was going to junk the stock twin system any just get a single straight pipe all the way the the rear box, so it'll effectively be a nur spec r but without the resonator.

Only issue is my local exhaust place is quoting me nearly as much as a good used system to do the above. Now I'm stuck on what to do!