Mopar fans know the horsepower ratings like the back of their hands. 425 horsepower second-gen Hemis. 797 horsepower RedEyes. 175 boosted horsepower in pocket-rocket Omnis. And those are the stock, factory-quoted numbers, some of which were highly suspect the moment they were officially released. 290 horsepower from the 340 found in the Challenger T/A and AAR 'Cuda? Yeah, and we bet you're hiding a 1972 440-6 powered Fury convertible on your property, too. It's okay, though...at Holley MoParty 2021, we have the cure for anyone who is tired of hearing inflated horsepower numbers. Thanks to our friends at Redline Motorsports and Midwest Mobile Dyno, we have the perfect opportunity to either prove that the power figures are legitimate, or to prove that your fellow Pentastar-addled gearhead friend needs to make some friends in the Manufacturer's Midway. For the "challenge" portion of the Dyno Challenge, we have two classes: naturally-aspirated and power-added. First, second and third place in each class, ranked by the biggest number to the wheels, wins a Holley product certificate for $400/$200/$100, for first, second and third place, respectively.

Without further ado, here's your winners for 2021:

Naturally Aspirated

Gary Herda's 2003 Dodge Viper SRT-10, Naturally Aspirated winner.

1. Gary Herda, Decatur, AL. 2003 Dodge Viper SRT-10, 8.3L V-10. 438 horsepower.
2. Joshua Addison, Madisonville, KY. 2017 Dodge Challenger, 6.4L V8. 431 horsepower.
3. Carl Webber, Mattoon, IL. 2020 Dodge Challenger Scat Pack Widebody, 6.4L V8, 418 horsepower.

Power Adder

Larry Rose's 1970 Dodge Challenger, Power Adder winner

1. Larry Rose, Newburgh, IN. 1970 Dodge Challenger, "Hellaphant" 426ci Gen III V-8 with supercharger. 901 horsepower.
2. Broce Phillips, Plainfield, IN. 2019 Dodge Charger SRT Hellcat, 6.2L V-8 Gen III with supercharger. 814 horsepower.
3. Greg Huizenga, Middleville, MI. 1976 Jeep Cherokee (FSJ). 5.7L Hemi V-8 with turbo and intercooler. 734 horsepower.