| PRODUCT | ENGINE COVERAGE / EPA EMISSIONS REDUCTION CREDIT VALUES |
| Purifilter |
1994-2003 HD Highway Engines: PM: 90% HC: 85% CO: 75% |
| AZ Purifier/Purimuffler with CCV |
1991-2004 HD High Engines: PM: 40% HC: 75% CO: 60% |
| AZ Purifier/Purimuffler |
1991-2003 Cummins/International Medium HD Engines: PM: 40% HC: 70% CO: 40% Diesel Retrofit Techology Verification 1991-1993 Cummins Heavy HD Engines: PM: 35% HC: 70% CO: 40% Diesel Retrofit Techology Verification All HD Highway 4 Stroke Engines: PM: 20% HC: 50% CO: 40% In respect to EPA Verifications, there is no verification letter for the 20% PM reduction for the ECS Purimuffler. This verification is carried over from the EPA Urban Bus Retrofit Rebuild Program. For further information, please contact Carl Wick from the US EPA at 202-343-9331. Diesel Retrofit Techology Verification All HD Highway 2 Stroke Engines: PM: 20% HC: 50% CO: 40% |
| Purifilter Plus |
1994-2006 Non-EGR Engines: PM: 90% HC: 85% CO: 75% Diesel Retrofit Techology Verification |
Ward Clean Air Products, LLC