The following manufacturers endorse Penn Grade 1® High Performance Oils

Koerner Racing Cams Tucson, AZ www.koernerracing.com
Cam Motion, Inc. Baton Rouge, LA www.cammotion.com
Howard Cams Oshkosh, WI www.howardscams.com
Schneider Racing Cams San Diego, CA www.schneidercams.com
Crower Cams San Diego, CA www.crower.com
Crane Cams Daytona Beach, FL www.cranecams.com
 

Crane Cams Recommendation Guide
LN Engineering Momence, IL

www.LNengineering.com
Web Cam Riverside, CA www.webcamshafts.com