Installation Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

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Turbocharger Exhaust Pipe Gasket (2) - Install NEW
Warm Up Three-Way Catalytic Converter (1) - Install
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CAUTION:
Refer to Fastener Caution .

Catalytic Converter Nut (1) - Install and tighten [4x] - Fastener Specifications
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CAUTION:
Refer to Component Fastener Tightening Caution .

NOTE:
A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation. Adhesives, Fluids, Lubricants, and Sealers

Install and tighten the heated oxygen sensor (1) using a suitable tool. Fastener Specifications
Connect the heated oxygen sensor electrical connector.
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Install and tighten the heated oxygen sensor (1) using a suitable tool. Fastener Specifications
Connect the heated oxygen sensor electrical connector.
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Catalytic Converter Brace (2) - Install
Catalytic Converter Brace Bracket Nut (1) - Install and tighten [5x] - Fastener Specifications
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Catalytic Converter Gasket (2) - Install NEW
With the aid of an assistant, install the exhaust muffler (1).
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Exhaust Muffler Hanger Bracket Nut (1) - Install and tighten [4x] - Fastener Specifications
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Electrical Connector (1) - Connect
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Electrical Connector (1) - Connect
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Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Install [2x]
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Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install [2x]
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Exhaust Pipe Clamp (1) - Tighten [2x] - Fastener Specifications
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Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications
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Floor Panel Reinforcement (2) - Install
Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
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Underbody Rear Air Deflector- Right Side (5) - Install
Underbody Rear Air Deflector Nut- Right Side (3) - Install and tighten [3x] - Fastener Specifications
Underbody Rear Air Deflector Bolt- Right Side (2) - Install and tighten [3x] - Fastener Specifications
Underbody Rear Air Deflector Nut- Right Side (4) - Install and tighten [2x] - Fastener Specifications
Rear Wheelhouse Liner Bolt- Right Side (1) - Install and tighten - Fastener Specifications
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Underbody Rear Air Deflector- Left Side (5) - Install
Underbody Rear Air Deflector Nut- Left Side (2) - Install and tighten [3x] - Fastener Specifications
Underbody Rear Air Deflector Bolt- Left Side (3) - Install and tighten [3x] - Fastener Specifications
Underbody Rear Air Deflector Nut- Left Side (4) - Install and tighten [2x] - Fastener Specifications
Rear Wheelhouse Liner Bolt- Left Side (1) - Install and tighten - Fastener Specifications
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Rear Tire Front Air Deflector- Left Side and Right Side (2) - Install [2x]
Rear Tire Front Air Deflector Bolt- Left Side and Right Side (1) - Install and tighten [4x] - Fastener Specifications
Lower the vehicle.
Inspect the exhaust system for leaks.