Omix Catalytic Converter- 07-09 Jeep Wrangler JK/JKUA failing catalytic converter contributes to poor fuel economy; weak engine performance and increased exhaust emissions. Often you won t recognize there is a problem until your JK fails your states emissions test. What can you do then? Omix ADA has the direct fit replacement catalytic converter assembly that can get your rig back up and running right. Each y pipe is constructed of stainless steel with pre cat and main catalytic converters on both