08/28/2026
We’re excited to welcome RPM Transmissions as an official sponsor of the inaugural ZR1 Invitational!
If you own a high-horsepower ZR1, chances are you’re already familiar with RPM. Their built transmissions and rear differential upgrades have become a go-to for ZR1 owners looking to put serious power to the ground.
RPM has been supporting the Corvette performance community for years, so having them step up and support a class built specifically around some of the fastest ZR1s around is a perfect fit.
Their sponsorship goes 100% directly into the winner-take-all pot for the racers.
One day. ZR1 vs. ZR1. Winner takes all.
📍 US 131 Motorsports Park — Martin, MI
📅 September 11–12, 2026
🏁 In partnership with Street Car Takeover
Thank you, RPM Transmissions, for supporting the racers and helping us make the first ZR1 Invitational something special!