JBA p/n 1655 headers are specifically designed to fit 1964-1/2 -70 Mustangs equipped with 351W engines equipped with manual transmission and a cable actuated clutch.
The mid-length design of the headers provides significant increases in torque and horsepower throughout the RPM range and allows for maximum ground clearance. Ideal for cars with lowered suspension.
For more info check out this link, http://jbaheaders.com/tech_articles/1655tech.asp
