K&N 66 vs. 77 Series vs. Sixth Element CAI: Which Did You Choose and Why?

MTNYOTAS · 2025-12-11T18:36:38+00:00

What's up 4GTaco fam!! Check out this recent Trailhunter we wrapped up at the shop. John brought his 2025 Trailhunter in for a full 74Weld portal axle setup and supporting mods to make 37s fit and clear. The truck now runs 74Weld portals, 74Weld billet rear links, an ADD winch bumper, Warn VR Evo 10 S, Rigid SR lighting, hybrid power relocation, and Method 703s wrapped in 37" Toyo RT Pros. The goal was simple. Keep the hybrid system happy, keep the geometry correct with portals, and build a truck that actually works off-road without losing daily performance. Portal service was handled at the 500 mile mark, and the truck left with proper alignment and all clearances dialed in. This setup gives the Trailhunter more ground clearance, stronger axle geometry, better approach angle, and a clean front recovery system. If you’re looking at portals, 37s, hybrid routing, or you just want to know which parts actually work together on the new 4th Gen Tacoma, feel free to reach out. Mountain Yotas is always around for build questions, part recommendations, and helping you plan your setup the right way the first time. About us: https://mountainyotas.com/about/ Request a quote anytime: https://mountainyotas.com/request-quote/ Address 4975 Miller St Wheat Ridge, CO 80033 Phone Call: (303) 834-7413

TrdMarkey

Member

Aug 6, 2025

#1

Those who have K&N CAIs, did you go with the 66 series or the 77 series, and why? They seem very similar, except the 77 series appears much easier to install. I’m also considering the Sixth Element CAI. Would love to hear what others think about each of them.

Just a heads-up, though: as someone who went down the CAI rabbit hole in my early years, you only reap the benefits of these if you also get a tune to adjust various ECT parameters for the different airflow.

Without a tune, aftermarket intakes can actually hurt performance more often than help. One of the reasons why I'm still weighing my options before making any decision.

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