Doug's Headers Manuals & User Guides

Header Doug is a premier manufacturer of high-performance exhaust headers and automotive exhaust systems, part of the PerTronix Performance Brands family. Since 1958, they have been known for producing meticulously tuned, hand-built, mandrel-bent exhaust headers that significantly enhance engine horsepower and torque.

Whether you are performing an LS engine swap, restoring a classic muscle car, or upgrading an existing exhaust system, Doug's Headers provides precisely crafted solutions. Their product line includes long tube, mid-length, and Tri-Y headers, as well as complete bolt-on exhaust systems and mounting hardware. Doug's Headers are renowned for their exceptional fitment, premium sealing beads, and durable metallic ceramic coatings.

• Are Doug's Headers compatible with classic cars and engine swaps?

  Yes, Doug's Headers specializes in exhaust systems for classic muscle cars and engine swaps, providing tailored components like headers, motor mount brackets, and transmission crossmembers.

• What warranty does Doug's Headers offer?

  All Doug's Headers and Exhaust products are guaranteed to the original purchaser to be free of defects in material and workmanship for one year from the date of purchase.

• When should I re-tighten my header bolts?

  Doug's Headers recommends checking all bolts periodically to ensure they have not loosened. Re-tighten them after the first 500 miles and then again at 1,000 miles.

• How do I protect my newly coated headers during engine break-in?

  Extreme heat can damage the appearance of the coating during a new engine break-in. Doug's Headers recommends breaking in new motors with stock manifolds or an old set of headers to prevent this.