Help your secondary air injection system deliver air to the catalytic converter as designed with the Standard Ignition Secondary Air Injection Pipe AT170, a manifold air tube for the catalytic converter position. It is a direct-fit replacement for the listed applications: the 1985-1988 Mercury Cougar and the 1988 Ford Thunderbird. See the Buyer's Guide tab for engine details.
The secondary air injection pipe carries air supplied by the secondary air injection system to the catalytic converter. There, the added air supports the oxidation of exhaust gases. Because the tube runs through the exhaust area, it is exposed to heat and road conditions. A cracked, corroded or leaking pipe may need replacing.
Signs this part may need replacing: Look for visible cracks or rust-through in the tube, a hissing or ticking leak near the converter area, or a broken or loose connection. An emissions-related warning light can also appear. Diagnose the cause first, since other components can produce similar symptoms.
Interchange: 2-1170 · 779-5370
EC4301 · E8SZ5F235A · 21170 · 7795370
This part cross-references / interchanges with the following part numbers:
What does the Standard Ignition AT170 do?
It is a manifold air tube that carries air from the secondary air injection system to the catalytic converter. There, the added air supports the oxidation of exhaust gases.
Which vehicles does the AT170 fit?
It is listed for the 1985-1988 Mercury Cougar and the 1988 Ford Thunderbird. See the Buyer's Guide tab for engine details.
What are signs this air injection pipe may need replacing?
Common signs are cracks or rust-through in the tube, a hissing or ticking leak near the converter area, or a loose connection. Diagnose the cause before replacing the pipe.
Which part numbers does the AT170 interchange with?
It interchanges with 2-1170, 779-5370, EC4301 and E8SZ5F235A.
Where is this pipe located on the vehicle?
It is positioned at the catalytic converter. It routes air from the secondary air injection system to the converter on the listed vehicles.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
