Help keep air flowing from the secondary air injection system to the exhaust manifold with the Standard Ignition Secondary Air Injection Pipe AT146. This right-side manifold air tube is a direct-fit replacement for several trucks, among them the 1985-1990 Chevrolet C60, 1985-1990 Chevrolet C70 and 1985-1990 GMC C6000. See the "Vehicles it fits" section for the full list and engine-specific fitment details.
The tube carries air supplied by the secondary air injection system into the exhaust manifold as part of the truck's emissions-control system. Heat and age can leave an air injection pipe cracked, damaged or leaking. If the original right-side tube has failed, the AT146 replaces it.
- Emissions specialist: Standard Ignition is a global manufacturer of emission components and keeps quality control in place throughout production, from individual components to the finished product.
- Research-driven: Backed by decades of industry-leading research and development focused on what technicians need.
- High-grade materials: Built with high-grade materials selected for precision performance and prolonged life.
- Professional construction: Made to give today's professionals what they need to get the job done right.
Signs this part may need replacing: visible cracks or holes in the tube, a ticking or hissing noise near the manifold, or an exhaust odor around the engine compartment. Diagnose the complete air injection system before replacing parts.
Interchange: 2-1146 · 779-5346
EC4327 · 15520412 · 21146 · 7795346
This part cross-references / interchanges with the following part numbers:
EC4327, 2-1146, 15520412, 779-5346
Frequently Asked Questions
What does the Standard Ignition AT146 do?
It is a manifold air tube that carries air from the secondary air injection system into the exhaust manifold on the listed Chevrolet and GMC trucks.
Which vehicles does the AT146 fit?
It fits several trucks, among them the 1985-1990 Chevrolet C60, 1985-1990 Chevrolet C70 and 1985-1990 GMC C6000. See the "Vehicles it fits" section for the full list and engine-specific details.
Which side does this pipe install on?
This pipe is cataloged for the right-side position on the listed applications.
What signs suggest the air injection pipe may need replacing?
Visible cracks or holes, a ticking or hissing noise near the manifold, or an exhaust odor can be signs of a leaking pipe. Diagnose the air injection system before replacing parts.
What part numbers does the AT146 interchange with?
It interchanges with 2-1146 (21146), 779-5346 (7795346), EC4327 and 15520412.
