Officially Licensed GM Product.  
Increase the performance and strength of your 2020-2027 Corvette with this Strut X Brace. Z06 / LT6, ZR1 and HTC convertible versions are now available.
Improves torsional rigidity by 8%, which enhances your C8's steering feel and handling precision on the n the road and on the track. 
The Strut X Brace directly addresses an opportunity the lead chassis engineer for the C8, Ed Moss, he said:
“The trick for torsional stiffness is that you’ve got to get the load through the tunnel and back to the shocktowers..." https://www.popsci.com/corvette- stingray-supercar-chassis-engineering. This brace accomplishes this "trick", transfering load from the tunnel and passenger firewall back to the shocktowers.
The C8 chassis cross brace is made from carbon fiber tubes and polished 304 stainless steel hardware. This makes the brace extremely strong yet lightweight.
The design's straight lines prevent flexing and spring,thus maximizing rigidity.
Makes a huge impact on your car's engine appearance.
Installation is done easily by removing 2 bolts and 4 nuts, installing the cross brace and re-installing those same bolts and nuts. 
The brace installs over the Engine Appearance Package (EAP) without any issues.
The ZR1 / Turbo / Supercharged version fits the new ZR1 as well as popular supercharged C8's like Magnuson and Callaway. It also fits many Turbocharged engines where the turbos are near the cats, like the ZR1.
For 2027 C8 Coupes purchase the ZR1 option.   the LS6 is much taller, it is taller than the LT6 in the Z06.
Please go to the last picture to see the color options for the Coupes. HTC are available in Red and Black. 
The HTC Strut X Brace makes a huge improvement in the creaking noises of HTC's as they get more miles (~15,000 miles) . https://www.corvetteforum.com/forums/c8-general-discussion/4952073-speedway-composites-chassis-cross-brace-for-htc.htm
Made in USA.
The pictures include those from a F1 chassis testing facility where the chassis torsional rigidity was measured with and without the strut brace to measure improvement in flexing, using the same methods as Indy, Speedway and F1.
Search "Speedway Composites" onCorvetteForum.com for all of the positive reviews. 
For 2027 C8 Coupes purchase the ZR1 option.   the LS6 is much taller, it is taller than the LT6 in the Z06.