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Fire Missile!

By far, my favorite wing design for the Supra!

I believe the instagram post was their first preliminary / initial dyno run....subsequent dyno runs (video) revealed a higher value...

2021 2.0 Supra Dyno

2021 2.0 Supra dyno

2021 2.0 Supra Dyno

I think this is what your referring to... Dyno of 2020 Z4 (MY21 Supra engine) vs 2020 Supra

I still prefer the 2020 exhaust note which is somewhat deeper and throatier in normal mode (not really a fan of sport mode burbles though)...The 2021 exhaust note sounds like an EU version exhaust and is kinda tame to me...

I first covered the area I wanted to cutout with tape so I could mark a 2" diameter circle... I used a dremel tool with disk to cut out the plastic panel within the marked circle... I used a small dremel grinding drum to finish the edges of the port hole... Yes, I placed black metal speaker...

Based on the total area of the 3 elongated exhaust port holes I found that a 2" diameter port has an equivalent cross sectional area...Also the rear panel height is only 4" and I didn't want to compromise the rigidity of the panel... Without ports added that exhaust energy was literally trapped...

DSport Magazine's 2021 Supra 2.0 dyno results:

And thanks for your Service as well! Yes, many of us had the same reaction wondering if the subs were blown...Once you eliminate the vibrations and allow the OE exhaust ports to "breath" the Subs actually sound pretty decent...Lining the interior metal sub enclosure walls with speaker batting...

I'm a retired Engineering Exec and Veteran as well (Former Marine)...I did get into high end audio as a hobby during the 80s and 90s and the interest has carried into my later years... I suspect the rattling and design error (i.e. placing a panel directly over the elongated exhaust ports) was...

Here is a list of materials with description and links to where I purchased them online...I included them at bottom of my original post... 2" Foam Pad 1" Speaker Wadding 2" Dia Exhaust Port Ports are centered over elongated exhaust ports shown below:

How to Improve OE Subwoofer Quality and Eliminate Rattles / Vibrations

There are actually a few variables / steps that need to be considered when making EQ adjustments... Hearing test curve (measured) Equal loudness curves (used as a reference) Sound environment spatial test assessment to identify and correct peaks, dips, and nulls (measured) Personal and...