Anyone have actual Dyno or Track 'hard numbers' comparing OEM stock with K&N, Holley, etc....? How good do these high $$ filters actually flow?

I'am looking for actual comparisons and not just 'seat of pants' feel or opinions.

Thanks for accurate replys.

Enjoy your cars.

 

Hot Rod Mag did one last year in one of their tech articles....If I rem correctly most were within 100 to 200 cfm of each other and very little diff in HP gain...
Try searching in the lt1 section, I believe someone posted it..