Unpopular opinion: CAI vs drop-in filter for my 2018 5.0

I spent $380 on a cold air intake last summer and honestly, my truck felt slower until I got a tune to go with it. My buddy just swapped to a K&N drop-in for $60 and his dyno numbers are only 4 hp behind mine. Anyone else feel like CAIs are overhyped without the supporting mods?

2 comments

2 Comments

the_patricia21d ago

Man, I gotta respectfully disagree with that one. A drop-in filter just traps less dirt and lets slightly more air through, but a proper CAI actually pulls cold air from outside the engine bay instead of hot underhood air. Your buddy might be close on the dyno, but on a hot summer day towing or hauling, that extra heat soak in his intake is gonna hurt his power way more than yours.

patricia_schmidt1421d ago

Wait, so your buddy's dyno run was with the hood open or a fan blowing directly on the intake tract... right? Because that's the only way a drop-in filter keeps up on a real-world hot day. I've seen guys slap those K&N drop-ins in their trucks that sit outside all day in the summer sun, and you can literally feel the power drop off after 20 minutes of stop-and-go traffic. The whole point of a proper CAI is pulling that dense, cool air from the bumper or the fender, not the air your radiator just blew all over the engine. On a dyno with good airflow, everything looks the same, but that's a lie. Put a temp sensor on both intakes after a 30 minute highway pull in 95 degree heat and see which one has you pulling timing.