DOUG S HEADERS D104-R Full Length Header Instruction Manual

Learn how to install D104-R Full Length Headers on your AMC vehicle with our easy-to-follow user manual. Improve your exhaust flow and increase horsepower with this high-quality product. Get step-by-step installation instructions and all the necessary hardware included. Perfect for AMC 68-74 Javelin/AMX, 71-74 Matador, and 72-76 Gremlin owners.

DOUG S HEADERS D353-B Full Length Header Instruction Manual

Learn how to install D353-B Full Length Header for 1955-57 Chevrolet 265-400 SBC with these easy-to-follow instructions. Improve engine performance with increased exhaust flow. Includes gaskets, bolts, nuts, washers, reducers, and Doug's stickers. Disconnect the negative battery cable and follow the step-by-step guide for a successful installation.

DOUG S HEADERS D336 4-Tube Full Length Header Instruction Manual

This user manual provides instructions for installing DOUG S HEADERS D336 4-Tube Full Length Header. It includes a warning about chemicals that could cause cancer and birth defects, along with notes on coatings and factors that affect installation. PerTronix Performance Brands suggests reading the instructions carefully before proceeding.