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AP Exhaust 645128 Catalytic Converter - Left
| Brand | AP Exhaust 645128 |
|---|---|
| Position | Left |
| Converter Type | Federal / epa direct-fit |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| California Air Resources Board (CARB) Certified | No |
| Boxed | No |
| Inlet A Connection Type | Flange |
| Outlet A Connection Type | Welded flange |
| Package Material | Corrugated cardboard |
| Package Type | Box |
| Product line | Direct Fit Converter |
| Fits | Isuzu · 7 vehicles |
Direct-fit design. Application-specific replacement for a cleaner exhaust service fit.
Flange connections. Secure inlet and welded outlet interfaces for a fixed exhaust layout.
Federal / EPA. Built for emissions-focused service on listed applications.
Cross-references 8975361040 for the same application. See all 1.
Direct-Fit Catalytic Converter
AP Exhaust 645128 is a direct-fit catalytic converter built for specific Isuzu NPR-HD applications. It uses a Federal / EPA direct-fit design with flange inlet and welded flange outlet connections for a straightforward exhaust replacement.
Key Features
- Federal / EPA direct-fit converter for application-specific exhaust service
- Single inlet and single outlet configuration
- Flange inlet connection for secure attachment
- Welded flange outlet connection for a fixed exhaust interface
- AP Exhaust 645128 for targeted replacement use
Detailed Description
This AP Exhaust catalytic converter is engineered for direct-fit replacement on select Isuzu NPR-HD trucks. The 645128 configuration is built around a flange inlet and welded flange outlet, which supports a clean exhaust connection without adapting the system to a universal layout. It is listed for 2020-2024 Isuzu NPR-HD, left, with Federal and California emissions coverage, and for 2025-2026 Isuzu NPR-HD, left, with state-use restrictions noted in the fitment data. If you are replacing a worn converter on an Isuzu NPR-HD, AP Exhaust 645128 provides a fitment-specific solution for the correct exhaust routing and emissions application.
This part cross-references 8975361040 for the same application.
What It Is Used For
- Replacing a restricted or failed catalytic converter
- Restoring exhaust flow in a direct-fit exhaust repair
- Addressing emissions-related converter service on Isuzu NPR-HD trucks
- Matching the original exhaust connection style for the listed application
Installation Notes and Tips
Fits 2020-2024 Isuzu NPR-HD, left. Fits 2025-2026 Isuzu NPR-HD, left. Verify emissions requirements before installation, especially for 2025-2026 applications with state restrictions noted in the fitment data. Confirm flange alignment and exhaust routing before final tightening or welding.
Quality Assurance
AP Exhaust Direct Fit Converter is built as an application-specific replacement line for exhaust service, with direct-fit construction intended to match the listed vehicle fitment.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2026 | Isuzu | NPR-HD | 6.6L | V8 | Left | Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details.; Direct Fit Converter |
| 2025 | Isuzu | NPR-HD | 6.6L | V8 | Left | Not for sale or use on vehicles licensed in the states of CA, CO, ME, and NY. Restrictions may apply in other states. Check with your state authority for details.; Direct Fit Converter |
| 2024 | Isuzu | NPR-HD | 6.6L | V8 | Left | Federal and California Emissions; Direct Fit Converter |
| 2023 | Isuzu | NPR-HD | 6.6L | V8 | Left | Federal and California Emissions; Direct Fit Converter |
| 2022 | Isuzu | NPR-HD | 6.6L | V8 | Left | Federal and California Emissions; Direct Fit Converter |
| 2021 | Isuzu | NPR-HD | 6.6L | V8 | Left | Federal and California Emissions; Direct Fit Converter |
| 2020 | Isuzu | NPR-HD | 6.6L | V8 | Left | Federal and California Emissions; Direct Fit Converter |
| No rows match your filter. | ||||||