The CPP Heavy Duty C-Notch Kit, part number 6372CNK-HD, is engineered for 1963-1972 Chevy C10 1/2 Ton trucks used in towing applications that require additional rear suspension clearance. This bolt-in kit provides 3 In. of added rear axle travel and is required when lowering 4 In. or more.
Manufactured from 3/8 In. steel plate, this heavy duty version is 1/8 In. thicker than the standard kit for increased strength under load. The system installs without fabrication and includes Grade 8 mounting hardware and bump stops for a complete installation.
The Heavy Duty version is recommended only for trucks used in towing applications and is not necessary for standard street use. Designed specifically for 1963-1972 Chevy 1/2 Ton trucks.
When it comes to lowering your 1963–1972 Chevy C10, stance is everything. But if you’re dropping the rear four inches or more, there’s one upgrade you absolutely can’t ignore: a properly engineered C-notch. Today we’re breaking down how to get the most rear suspension travel possible without destroying ride quality or compromising frame integrity, and why the Classic Performance Products C-Notch Kit is one of the smartest upgrades you can make.
A C-notch is referred to the C-shape cut you will need to do on the frame to allow for more suspension travel for lowered application. The C-notch kits we offer are reinforcement brackets to strengthen your frame.
When will I need to C-notch my frame?
We recommend using the C-notch when you plan to lower your truck 4 or more inches.
