SA Extreme, Large Butterfly Carb

Extensively modified stock appearing carb producing the most HP possible utilizing a stock carb body.

In addition to having the largest Venturi (>.680) of any of our other bored carbs, the butterfly size has been significantly increased to provide 60% more airflow than a stock carb. Fuel circuits and jets have been reworked to maintain proper mixture. Available in

• Similar to our Stage 3, but has additional work on inlet side (handworked for ~10% more flow). May have internal or external epoxy. All stage 4 carbs are dyno tested before shipping. No Choke.
  

Dyno testing shows these carbs to produce up to 1.0+ hp more that standard bored (stock butterfly) and over two+ hp than a stock carb with only marginal loss in low end and idle quality.

Stage 4 carbs are built to order and typically take 1 week to ship.