Catalytic Converter for Chevrolet Blazer (2019-2023) 3.6L Front Left & Right
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Direct-Fit Front Left & Right Catalytic Converter Set for 2019-2023 Chevrolet Blazer (C1XX)
What it Does: The Front Left & Right Catalytic Converter Set restores factory exhaust gas treatment and clears catalyst efficiency diagnostic trouble codes on the 2019-2023 Chevrolet Blazer 3.6L.
The Stock Chevrolet Blazer Catalytic Converter Degradation
Factory close-coupled manifold converters on the C1XX platform face extreme thermal cycling from the high-revving direct-injection LGX V6. Over time, internal washcoat degradation, fuel vapor blow-by, and severe heat expansion cause ceramic monolith breakdown, leading to restricted exhaust backpressure, lost fuel economy, and persistent P0420/P0430 threshold fault codes.
The Engineering Solution
Engineered as a bolt-on replacement for part numbers 641635 and 641636, this dual assembly utilizes heavy-duty 409 stainless steel tubular bodies built to survive thermal shocks. High-flow internal ceramic honeycombs loaded with robust precious metal washcoats provide efficient HC, CO, and NOx reduction without restricting exhaust velocity. Precision-machined, thick OE-style flanges ensure an airtight seal against manifold studs, while pre-threaded oxygen sensor ports accept factory O2 sensors without harness stretching or wire modification.
Technical Specifications
| Fitment | 2019-2023 Chevrolet Blazer |
|---|---|
| Engine / Chassis | 3.6L LGX V6 / C1XX |
| Stock Output | 308 hp / 270 lb-ft |
| Replaces OEM Part # | 641635, 641636 |
Compatibility
- 2019 Chevrolet Blazer 3.6L V6 (Front Left & Right)
- 2020 Chevrolet Blazer 3.6L V6 (Front Left & Right)
- 2021 Chevrolet Blazer 3.6L V6 (Front Left & Right)
- 2022 Chevrolet Blazer 3.6L V6 (Front Left & Right)
- 2023 Chevrolet Blazer 3.6L V6 (Front Left & Right)
- Note: Fits 3.6L V6 models only; does not fit 2.0L Turbo or 2.5L I4 engines.
Frequently Asked Questions
Does this fit the C1XX Blazer?
Yes, this is a direct fit for the 2019-2023 Chevrolet Blazer equipped with the 3.6L LGX V6 engine.
Is this catalytic converter set legal for use in California?
No, this unit is 46-state legal (EPA compliant) and cannot be sold or registered in California, New York, Colorado, or Maine.
The Chevrolet Reliability Caliber
Engineered to handle highway commuting and maximum 4,500-lb towing stress, these direct-fit converters maintain proper manifold backpressure to protect valvetrain integrity under load.
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