An hour. Took me and a friend 90 mins and we are noobs

Thanks.

How much hp i will gain on a stock '16 370 z?

mmm.... can't say exactly how many hp it gains, unless you dyno it, but don't expect something like a 20+ hp gains from a $250 mods buddy.

however, it does make a positive difference and it is noticeable.

Just curious, did this and left the resonators off the crankcase tubing, but after looking into some DIY for a catch can a lot of people left those on. Are they necessary?

My tips for installing K&N Typhoon CAI:
1. do not install and/or immediately remove the K&N Typhoon CAI ASAP.
2. reuse the K&N Typhoon CAI in a land fill or as a planter.
3. purchase and install either the Z1 Motorsports or Stillen G3 long tube CAI.
4. enjoy your Z.