https://my350z.com/forum/ Moving all that air in and out efficiently en Wed, 20 May 2026 23:20:10 GMT vBulletin 60 https://my350z.com/forum/blueevolution/misc/rss.jpg https://my350z.com/forum/ https://my350z.com/forum/intake-exhaust/629706-going-back-to-stock-airboxes-from-z1-2-5n-cai-retune-needed-new-post.html Sun, 10 May 2026 00:46:06 GMT Hi - Last few car washes have caused water to gather around the filters of the Z1 CAI, so I’m just going to throw the stock airboxes back on since the CAI likely isn’t doing anything other than... Hi - Last few car washes have caused water to gather around the filters of the Z1 CAI, so I’m just going to throw the stock airboxes back on since the CAI likely isn’t doing anything other than making noise.

Anyway, I have an HR that is UpRev tuned for shorty headers, HFCs, and Motordyne exhaust - and of course the CAI (2.5”).

For those with more knowledge than me - do you think a retune is necessary to accommodate the stock airboxes? I’m inclined to think I’ll be fine since stockers are 2.5” as well. Anyone with tuning experience have any insight?

Of note, I have a couple of AutoX events coming up next weekend, so the car will be driven hard.

Thanks in advance!
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