Perfect Size for Styrene Mufflers

Hey guys, today i bought some Styrene tubbing in hope of making an N1 exhaust. I bought sizes 1/4" and 11/32". I thought about using the 11/32" as the canister and 1/4" as the tip. Well turns out that they were a bit big. What sizes do you guys recommend for a perfect N1 muffler. And can you guys please provide pics. Here is how mine turned out.

Thanx,

http://nurspec.20m.com/images/dsc05406.jpg
http://nurspec.20m.com/images/dsc05402.jpg
http://nurspec.20m.com/images/dsc05407.jpg

I use aluminum tube in sizes of 9/32 for can and 1/4 for the tip, it's a tight fit but works.

I use aluminum tube in sizes of 9/32 for can and 1/4 for the tip, it's a tight fit but works.

Isn't it a bit like mine, which i guess is kinda too big. Do you guys think that 1/4" would be ideal for Canister?

1/4 gives you a small tip, but I guess itd come out to a 3.75 tip. I much prefer my 1/4tip. it looks pretty cool. matter of fact, check out my itr turbo thread for a decent size muffler and tip.

I see some in real life bigger than that lol.

eyah so have i and should make the exhaust that goes on an angle