What to do if Doug's Headers D451 leaks on my Mopar B Body?

[MacFinley]

If you're experiencing exhaust leaks after installing Doug's Headers D451 on your Mopar B Body, here's how to address the issue: First, carefully check all header bolts to ensure they're tightened to the manufacturer's torque specifications, starting from the center and working outwards. Make sure all bolts are securely fastened. Next, inspect the sealing beads on the headers; the raised bead is designed to create a tight seal. Verify they are correctly positioned. Examine the header gaskets for any damage or misalignment, and replace them if necessary. Start the engine and let it reach operating temperature, listening for leaks or unusual noises. If leaks persist, turn off the engine and retighten all bolts while the engine is still warm. It's also important to periodically check and re-tighten the bolts, especially after the first 500 and 1000 miles. For further assistance or specific troubleshooting steps, consider contacting PerTronix for support.