Exhaust Manifold 23511222 for Freightliner Columbia, Freightliner Century, Western Star Trucks (2002–2011)Product Overview Part Name: Exhaust Manifold Part Number: 23511222 Vehicle Compatibility: Freightliner Columbia, Freightliner Century, and Western Star heavy duty trucks equipped with Detroit Diesel Series 60 engines. Suitable for trucks produced within the stated year range (20022011). Configuration: Direct fit exhaust manifold engineered to match original exhaust port spacing and mounting points for Series 60 engines. Function: Channels exhaust