Edelbrock Thunder Series AVS Carburetors are designed and factory calibrated for small cubic-inch engines such as 305 c.i.d and smaller, 302 c.i.d. and smaller, and dual-quad applications, like Edelbrock RPM Dual-Quad Air-Gap, Edelbrock C-26, F-28 and Street Tunnel Ram. For single carb applications, match the carbs with an Edelbrock Performer or Performer EPS manifold or others. The carbs include both timed and full vacuum ports for ignition advance. Product #1801 is calibrated for single-quad applications and comes packaged with Metering Jets (Primary .86, Secondary .095), Primary Rod (.065 x .052), and orange spring.

Edelbrock, LLC, is a Torrance-based automotive aftermarket company founded in 1938. Vic Edelbrock Sr. was at the helm of the company's inception, entering the industry as a manufacturer of expert quality intake manifolds. His product development process involved a roadster in which he installed the parts he created and test-drove it around to see what improvements needed to be done to increase performance.

California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.