Application: It drives the Air Injection Reactor (AIR) pump, also known as the smog pump, on small-block Chevy (SBC) and some big-block engines.
$50.00
| Condition | Used: An item that has been used previously. The item may have some signs of cosmetic wear | Manufacturer Part Number | 3927116, 3927166AU |
|---|---|---|---|
| Vintage Part | Yes | Finish | Black |
| Country of Origin | United States |
Application: It drives the Air Injection Reactor (AIR) pump, also known as the smog pump, on small-block Chevy (SBC) and some big-block engines.
• Compatible models (primarily 1968–1972/73 era):
• Camaro
• Chevelle
• Nova
• Corvette (C3, 68-81 in some listings)
• Other Chevy models with 307, 327, 350, or 396 engines (except certain high-performance variants like 375 hp).
• Specs: Typically a 5¾-inch diameter, single V-groove pulley with 3-bolt mounting. It’s often stamped 3927116 or 3927116 AU (the “AU” is a casting/date code suffix).
This pulley was part of the emissions control system introduced in the late 1960s to reduce exhaust pollutants by injecting air into the exhaust manifold.
