SA Extreme, Large Butterfly Carburetor - Choice of Fuel
Extensively modified, stock-appearing carburetor that produces the most HP possible utilizing a stock carb body.

In addition to having the largest Venturi (>.670) 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.

• Similar to our Stage 3, but has additional work on inlet side (hand-worked for ~10% more flow)
• May have internal or external epoxy
• No choke
• All Stage 4 carbs are dyno-tested before shipping. Dyno testing shows these carbs to produce up to 1.0+ HP more than the standard bored (stock butterfly) and over 2+ HP more than a stock carb with only marginal loss in low-end and idle quality.

*Note: Stage 4 carbs are built to order and may take one week to ship.