
Breaking in a new engine with Doug's Headers requires a specific approach to protect your headers and optimize engine performance. According to Doug's Headers' installation guidelines, it's generally best to use stock manifolds or an older set of headers for the initial break-in period. This helps prevent potential heat-related damage to the header's coating during the critical break-in phase. To break in your new engine effectively: Start the engine and let it reach its operating temperature. Listen for any unusual sounds and inspect for exhaust leaks. If everything seems fine, shut off the engine while it's still warm and tighten all header bolts. Regularly check the bolts, especially after the first 500 miles and again at 1000 miles, to ensure a proper seal and peak performance of your Doug's Headers. Following these steps helps you properly break in your engine while protecting your Doug's Headers for optimal performance and longevity.


