These share all the performance advantage of the popular Edelbrock Performer Series with innovative new features. The Qwik-Tune secondary air valve can be easily adjusted to match your needs. Whether you want the secondaries to"kick in"early or late, you can set the air valve using standard tools, with no extra springs. It's a quick and simple process. Qwik-Tune combinedwith the other great features makes the Edelbrock Thunder Series AVS the most convenient and dependable carburetor available today.

For 4x4 owners, the Thunder Series AVS off-road carbs include spring-loaded needles and seats for outstanding performance in rough, uneven terrain. Edelbrock engineers have taken a great carb and made it even better with the exciting Edelbrock Thunder Series AVS!