Brendon_W1 0 Report post Posted February 21, 2020 Does anyone know whether this is a muffler/ resonator/ cat converter? Muffler shop told me it was a cat converter but reading around different forums, they suggested it was the first resonator. Parts #2 and #3 in the photo attached. Quote Share this post Link to post Share on other sites
KwS 2378 Report post Posted February 21, 2020 (edited) IIRC its a resonator. Cats are #2 and #3 in the diagrams and usually have O2 sensors on either side of them. E: oh, you didnt mean the highlighted #1. Edited February 21, 2020 by KwS Quote Share this post Link to post Share on other sites
Brendon_W1 0 Report post Posted February 21, 2020 17 minutes ago, KwS said: IIRC its a resonator. Cats are #2 and #3 in the diagrams and usually have O2 sensors on either side of them. E: oh, you didnt mean the highlighted #1. so #2 and #3 are cats? ahhh do you know if it'll produce a bad smell if i get them removed? Quote Share this post Link to post Share on other sites
Eagle 1531 Report post Posted February 21, 2020 They are likely a secondary set of cats, the primary ones are integrated into exhaust manifold. Depending on your emission standard you may or may not have post cat O2 sensors after the primary cats. Doubt you will achieve much by deleting them, maybe a slight change in exhaust tone for better or worse. Quote Share this post Link to post Share on other sites
Brendon_W1 0 Report post Posted February 21, 2020 2 minutes ago, Eagle said: They are likely a secondary set of cats, the primary ones are integrated into exhaust manifold. Depending on your emission standard you may or may not have post cat O2 sensors after the primary cats. Doubt you will achieve much by deleting them, maybe a slight change in exhaust tone for better or worse. Dont think there was any post o2 sensors when i had a look Quote Share this post Link to post Share on other sites
