To buy headers or not?

Originally Posted by husam2012

In my opinion, the only worthwhile options are the Z1 shorties and the PPE headers. The FI long tube headers (LTHs) are not equal length and don't flow well. I initially had the Z1 shorties on my car, switched to FI LTH, and noticed a power loss. After switching to the PPEs, I regained the lost power.

Recently, I dyno-tuned a 2016 370Z Nismo at my shop. It achieved 35x whp with just ART pipes, a full Motordyne exhaust, and E85 tuning. The car had stock intakes with K&N filters. In my opinion, there's no reason to pursue more NA power beyond this point.