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I'm still using the OEM filter. Texas is pretty dusty depending on where you are driving and how hard the wind is blowing. I'm more concerned about my cylinder bores than I am about the 7 horsepower. I considered the Attack Blue. They have published some filtration comparison tests, but not against the stock filter. I've asked for that data a few times and have received no reply. I figure that there's a reason for that.
Our team recognizes you're in need of assistance regarding the recommended engine air filter replacement needed for your Corvette. Please know, we strongly suggest that you always utilize OEM parts for any repairs needed. If interested, our team would like the opportunity to assist with this effort alongside your dealer. For support with this, please send us an email with these details to socialmedia@gm.com. Be sure you include "tcoury/Corvette Forum" in the subject line of your outreach. Your cooperation is much appreciated.
Burger Motorsports offers larger higher flow replacement air filter elements for both the stock Z06 intake and the GM Performance “Jake Box” Intake.
Plenty of performance dyno test results on the Burger website.
I run the Burger AF in the GM Performance “Jake Box” Intake on my ‘19 Z06. Per Burger thats approx. 20hp over the more restrictive standard GM Jake Box filter element or approx. 31hp total over the stock Z06 intake and filter.
With a good tune there’s even more output available.
I enquired at a few online Chevy parts sites. All responded that it's been discontinued and there's no stock in the Chevy dealer network.
I bought it from ACS. I just looked at their website and it does say Sold Out. I had also previously purchased it from a GM dealer for my other Z06 two years prior.