Buick Catalytic Converters
- AP Exhaust®Direct Fit Catalytic Converter and Pipe Assembly (642706)Catalytic Converter and Pipe Assembly (642706) by AP Exhaust®. Converter Configuration: Direct Fit. Without Air Tube. With 1 O2 Sensor Port. Catalytic Converter Overall Length: 38.38". Today’s exhaust performance market continues to...$220.56
- AP Exhaust®Direct Fit Catalytic Converter and Pipe Assembly (642583)Catalytic Converter and Pipe Assembly (642583) by AP Exhaust®. Converter Configuration: Direct Fit. Catalytic Converter Overall Length: 37.38". With O2 Sensor Port. Today’s exhaust performance market continues to cover a broad...5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions$280.93
- AP Exhaust®Direct Fit Catalytic Converter and Pipe Assembly (642525)Catalytic Converter and Pipe Assembly (642525) by AP Exhaust®. Converter Configuration: Direct Fit. Catalytic Converter Overall Length: 41.5". With O2 Sensor Port. Today’s exhaust performance market continues to cover a broad spectrum...5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions$280.13
- AP Exhaust®Direct Fit Catalytic Converter and Pipe Assembly (642278)Catalytic Converter and Pipe Assembly (642278) by AP Exhaust®. Converter Configuration: Direct Fit. Catalytic Converter Overall Length: 37.88". With O2 Sensor Port. Today’s exhaust performance market continues to cover a broad...5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions$268.81
- Walker®Ultra™ Direct Fit Large Oval Body Catalytic Converter (16386)Ultra™ Catalytic Converter (16386) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Large Oval. Catalytic Converter Overall Length: 18.25". Without O2 Sensor Port. Walker is an OE supplier to many...Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability$204.46
- Walker®Ultra™ Direct Fit Large Oval Body Catalytic Converter (15817)Ultra™ Catalytic Converter (15817) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Large Oval. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length: 24". Walker is an OE supplier to...$388.46
- Walker®Ultra™ Direct Fit Large Oval Body Catalytic Converter (15642)Ultra™ Catalytic Converter (15642) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Large Oval. With 1 Inlet. With Air Tube. Without O2 Sensor Port. Catalytic Converter Overall Length: 25.25". Walker is...$170.21
- Walker®Ultra™ Direct Fit Oval Body Catalytic Converter (14712)Ultra™ Catalytic Converter (14712) by Walker®. Converter Configuration: Direct Fit. Position: Front. Catalytic Converter Body Shape: Oval. With 1 O2 Sensor Port. Catalytic Converter Overall Length: 17". Walker is an OE supplier to...$652.29
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (14703)Ultra™ Catalytic Converter (14703) by Walker®. Converter Configuration: Direct Fit. Position: Passenger Side. Catalytic Converter Body Shape: Round. With 1 O2 Sensor Port. Catalytic Converter Overall Length: 14". Walker is an OE...$568.37
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (16998)Ultra™ Catalytic Converter (16998) by Walker®. Converter Configuration: Direct Fit. Position: Driver Side. Catalytic Converter Body Shape: Round. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 17". Walker is an OE...$464.77
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (16870)Ultra™ Catalytic Converter (16870) by Walker®. Converter Configuration: Direct Fit. Position: Front. Location: Towards Radiator. Catalytic Converter Body Shape: Round. Catalytic Converter Overall Length: 16". Walker is an OE supplier...$609.30
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (55727)Ultra™ Catalytic Converter (55727) by Walker®. Converter Configuration: Direct Fit. Position: Rear. Catalytic Converter Body Shape: Round. With 1 O2 Sensor Port. Catalytic Converter Overall Length: 55.35". Walker is an OE supplier to...$407.04
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (16777)Ultra™ Catalytic Converter (16777) by Walker®. Converter Configuration: Direct Fit. Position: Rear. Location: Underbody. Catalytic Converter Body Shape: Round. Without O2 Sensor Port. Catalytic Converter Overall Length: 18.5". Walker...$355.95
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (16776)Ultra™ Catalytic Converter (16776) by Walker®. Converter Configuration: Direct Fit. Position: Front. Catalytic Converter Body Shape: Round. Without O2 Sensor Port. Catalytic Converter Overall Length: 13.5". Walker is an OE supplier...$548.44
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (54627)Ultra™ Catalytic Converter (54627) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length: 40". Walker is an OE supplier to many...$316.02
- Walker®Ultra™ Direct Fit Round Body Catalytic Converter (54626)Ultra™ Catalytic Converter (54626) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length: 38.5". Walker is an OE supplier to many...$283.64
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (15502)Ultra™ Catalytic Converter (15502) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. Without O2 Sensor Port. Catalytic Converter Overall Length: 21.875". Walker is an OE...$69.19
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (15680)Ultra™ Catalytic Converter (15680) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall Length: 25". Walker...$80.62
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (16710)Ultra™ Catalytic Converter (16710) by Walker®. Converter Configuration: Direct Fit. Position: Front Passenger Side. Location: Firewall Side. Catalytic Converter Body Shape: Standard Oval. Without O2 Sensor Port. Catalytic Converter...$425.50
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (16709)Ultra™ Catalytic Converter (16709) by Walker®. Converter Configuration: Direct Fit. Position: Front Driver Side. Location: Radiator Side. Catalytic Converter Body Shape: Standard Oval. Without O2 Sensor Port. Catalytic Converter...$381.06
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (16574)Ultra™ Catalytic Converter (16574) by Walker®. Converter Configuration: Direct Fit. Position: Rear. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. Without O2 Sensor Port. Catalytic Converter Overall Length: 21.5"....$274.40
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (54414)Ultra™ Catalytic Converter (54414) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length: 36.25". Walker is an OE...$229.94
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (15832)Ultra™ Catalytic Converter (15832) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall Length: 25.25"....$121.81
- Walker®Ultra™ Direct Fit Standard Oval Body Catalytic Converter (15646)Ultra™ Catalytic Converter (15646) by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Standard Oval. With 1 Inlet. Without O2 Sensor Port. Catalytic Converter Overall Length: 20.25". Walker is an OE...$165.74
- iD Select®Standard Universal Fit Oval Body Catalytic Converter (70423)Standard Catalytic Converter (70423) by iD Select®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. With 1 Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic...$23.92
- iD Select®Standard Universal Fit Oval Body Catalytic Converter (70316)Standard Catalytic Converter (70316) by iD Select®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2". Catalytic...$72.47
- iD Select®Standard Universal Fit Oval Body Catalytic Converter (70318)Standard Catalytic Converter (70318) by iD Select®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic...$72.47
- iD Select®Standard Universal Fit Oval Body Catalytic Converter (70317)Standard Catalytic Converter (70317) by iD Select®. Converter Configuration: Universal Fit. Location: Undercar. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.25". Catalytic...$72.47
- iD Select®Standard Universal Fit Round Body Catalytic Converter (70248)Standard Catalytic Converter (70248) by iD Select®. Converter Configuration: Universal Fit. Position: Rear. Location: Undercar. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...$25.20
- Eastern Catalytic®ECO CARB Direct Fit Undercar Catalytic Converter and Pipe Assembly (850662)ECO CARB Undercar Catalytic Converter and Pipe Assembly (850662) by Eastern Catalytic®. Converter Configuration: Direct Fit. Position: Center. With 1 O2 Sensor Port. Catalytic Converter Overall Length: 40". If you need to replace your...$743.90
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The Buick catalytic converter (AKA catcon or cat) was first introduced in the mid-70's, and back then, it performed only two tasks, which is exactly why it was called a two-way converter. It oxidized carbon monoxide to carbon dioxide and hydrocarbons to water and carbon dioxide (oxidation stage). In 1981, the two-way converter was replaced by a much more efficient three-way catcon, which additionally reduced nitrogen oxide emissions (reduction stage).
Today, the two-way version is used in diesel applications only, while most vehicles are equipped with a three-way catalytic converter. Located between the engine and muffler, the converter actually resembles a muffler in shape, though the construction of these two units is completely different. The body of the converter is usually made of stainless steel. Inside the body, you'll find an insulated chamber, which contains three main components of any converter: substrate (or catalyst core), washcoat, and catalyst.
The catalyst core usually has a honeycomb structure, and it's most often a ceramic monolith. Basically, it serves as a support for the washcoat. The washcoat itself is a carrier for the catalytic materials. Materials for the washcoat are chosen to form an irregular surface, which maximizes the catalytically active layer available to react with the exhaust gases. And then comes the catalyst, which is most ofter a mixture of precious metals such as palladium (oxidation catalyst) and rhodium (reduction catalyst). When the exhaust stream passes through the converter, it contacts with the catalyst and all the toxic elements covert into the harmless substances. The leaving gas is monitored by the control system to make sure it meets the emissions requirements.