These steel extensions are manufactured to factory specifications for use with small-block or big-block smog tubes. Extension tubes are used at each exhaust port to pump air into the chamber and improve combustion. Each engine requires one tube per cylinder. Available individually, or in a complete set.
Authentic reproduction of the original GM product.
Find in OPGI's 2018 Monte Carlo Catalog page 178.
This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), 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.