W&L Inc. is a US company that is focused on developing catalysts and DPFs for both European and North American vehicles. The product line consists of diesel oxidation catalysts and diesel particulate filters for several makes and models including: Sprinter, Mercedes, Ford, Isuzu, Chevrolet, GMC, BMW, Audi, and Volkswagen.
W&L Inc. uses JMJ-Poland (an ISO9001 and ISO9002 certified facility) to build all of their catalysts and DPFs from European sourced components. These parts are direct bolt-on replacements for their OEM counterparts, and with proper maintenance they meet OEM specifications. All W&L Inc. products are brand new (not remanufactured) and have no core charge. DPF Parts Direct is an authorized distributor of W&L Inc. products and we will work with you to make sure that the correct part is sourced for your application. Feel free to contact us via phone, email, or chat so that we can assist you before purchasing your W&L Inc. parts. Please make sure to have your OEM part number, or year make and model information available for us to be able to assist you.
As with all aftermarket catalysts and DPFs, these units are currently not for sale in the state of California.
W&L Inc. Catalysts and DPFs (2)

Mercedes DPF - GL320 3.0L 2007-2008 from W&L Inc. (WL-1017US)
$849.99
This aftermarket Mercedes DPF from W&L Inc. is built to OEM specifications and is a hassle-free replacement for the original part. Made from European materials, the parts are built in Poland and are never remanufactured or have a core charge. DPF Parts Direct is an authorized distributor of W&L Inc. products and we will work with you to ...

Mercedes DPF - GL320, GL350, ML320, ML350 3.0L 2009 from W&L Inc. (WL-1012US)
$999.99
This aftermarket Mercedes GL320, GL350, ML320, and ML350 DPF from W&L Inc. is built to OEM specifications and is a hassle-free replacement for the original part. Made from European materials, the parts are built in Poland and are never remanufactured or have a core charge. DPF Parts Direct is an authorized distributor of W&L Inc. product...