I feel like I should step in here and help the poor kid out... Since its not in the wasteland yet. Hmm.
All I can say is read more, in fact read everything skyline related you can get your sweaty little hands on, if your heart/mind/any other part of your anatomy is set on a 34 natro get one.
Put on a poddy cause you'll like the noise
A cheap exhaust, 2.5 inch mandrel bent with a center resonator and a rear muffler (not a bloody cannon)
Don't bother with extractors its not worth it for fug all gain.
and if your cashed up go the stance road, if not then lowered springs and nice second hand rims.
1.It will be slow, don't be a street racer
2. It won't be legal noise
3. Cops will hassell you
Your welcome