Partnership will deliver powerful and scalable performance upgrades for GM vehicles and aims for enhanced dealer network accessBOWLING GREEN, Ky., Aug. 12, 2025 (GLOBE NEWSWIRE) -- Holley Performance Brands (NYSE: HLLY), a leader in automotive aftermarket performance solutions, and Callaway Cars, a premier provider of OEM-integrated performance solutions, today announced a partnership to develop and launch a line of performance packages for GM trucks and SUVs. The partnership marks a new era for two automot ...