Are Headers Worth It?

Summary by Krater

The host installs a 4-1 aftermarket exhaust header on a Mazda Miata and tests it on a dyno to see if it delivers the expected horsepower gains.

From the video

Answers: Do aftermarket exhaust headers increase horsepower on a Mazda Miata?

• installing aftermarket exhaust headers on Mazda Miata
• dyno testing 4-1 headers
• exhaust scavenging and engine performance

What it concludes

• A 4-1 header is best for making peak horsepower at high RPMs, though it can sacrifice some low-end and mid-range torque.
• A tri-y header generally provides good all-around performance and gains in mid-range torque, but might sacrifice top-end power.
• Installing a 4-1 header on the Mazda Miata added around 4 horsepower to peak power and improved mid-range power delivery.