Tenneco has announced an expansion of its Walker Emissions Control product line with 36 part numbers, representing 10 million replacement opportunities. Included are 14 additional Walker Ultra direct-fit catalytic converters that are EPA-compliant, six Quiet Flow SS direct-fit stainless steel muffles and 16 new pipe, resonator assembly and hardware part numbers. The new parts combine to cover 192 late-model applications. Engineered for OBDII vehicles, the converters offer original equipment-style design and fit, including hangers, flanges and brackets. The mufflers resist rust-out more than three times longer than competitors’ premium aluminized mufflers, according to Tenneco.