Guaranteed more horse power would be a supercharger.....
The least agressive intake is the K&N
The most agressive is the jlt ram air intake
Those others you mentioned fall somewhere in between....
The most economical air intake mod is the gotts mod.....
There are other restrictions that need to be addressed also....tb size, tb inlet on the manifold, cmcv, intake runner size, head ports and valves, cam duration, timing, headers, catalytic converters, ....with these your engine can only take in so much air.....then add in the limits of the senors functions
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