New Headers For 1961-’66 Chevy Trucks With A Big Block Engine

One of the first things any hot rodder does to their ride is improve performance. That typically means installing a set of headers. Let’s face it, they look great, help performance, and with the right exhaust, help produce a sound that is unmistakably all muscle. Doug Thorley Headers gets it, and has just finished developing a new set of Tri-Y headers for the 1961- ‘66 Chevrolet C- and K-series trucks, Blazers, and Suburbans with a big block engine.

These headers are backed by more than 50 years of knowledge and experience and are sure to outflow your stock exhaust manifolds by leaps and bounds. Tri-Y (4 into 2 into 1) style headers, by design, will increase the power of your engine across the widest RPM band possible. That is the beauty of the design. That is also why many feel they are the best street header available.

To make these headers last, Doug Thorley Headers built them using industry-leading 14-gauge mild-steel tubing and utilize 3/8-inch-thick flanges. Finally, appearance is everything, and all Doug Thorley headers come beautifully ceramic-coated to greatly reduce underhood temperatures and protect the headers from the environment. These headers are American made and are backed by a lifetime warranty of course.

  • Item: THY-374Y-C
  • Material: Steel
  • Finish: Silver ceramic coated
  • Primary tube diameter: 1-7/8 inches
  • Primary tube gauge: 14 Gauge
  • Collector diameter: 3 inches
  • Tuned: No
  • Flange thickness: 3/8-inch
  • Gaskets included: Yes
  • Adapters/reducers included: Yes
  • Warranty: Limited lifetime to original purchaser

Article Sources

About the author

Randy Bolig

Randy Bolig has been working on cars and has been involved in the hobby ever since he bought his first car when he was only 14 years old. His passion for performance got him noticed by many locals, and he began helping them modify their vehicles.
Read My Articles

Hot Rods and Muscle Cars in your inbox.

Build your own custom newsletter with the content you love from Street Muscle, directly to your inbox, absolutely FREE!

Free WordPress Themes
Street Muscle NEWSLETTER - SIGN UP FREE!

We will safeguard your e-mail and only send content you request.

Street Muscle - The Ultimate Muscle Car Magazine

We'll send you the most interesting Street Muscle articles, news, car features, and videos every week.

Street Muscle - The Ultimate Muscle Car Magazine

Street Muscle NEWSLETTER - SIGN UP FREE!

We will safeguard your e-mail and only send content you request.

Street Muscle - The Ultimate Muscle Car Magazine

Thank you for your subscription.

Subscribe to more FREE Online Magazines!

We think you might like...



Classic Ford Performance

Street Rods

Classic Chevy Magazine

Street Muscle - The Ultimate Muscle Car Magazine

Thank you for your subscription.

Subscribe to more FREE Online Magazines!

We think you might like...

  • Classic Ford Performance
  • Street Rods
  • Classic Chevy Magazine

Street Muscle - The Ultimate Muscle Car Magazine

Thank you for your subscription.

Thank you for your subscription.

Street Muscle - The Ultimate Muscle Car Magazine

Thank you for your subscription.

Thank you for your subscription.

Loading