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Showing results for tags 'cats'.
Did several searches and could not find the answer if both the headers and cats can be swapped going from 3.6l to a 3.4l. For thread completeness, there several threads noting that you can put 3.6 mufflers on a 3.4, connecting to 3.4l cats. I use bypass pipes so mufflers are not part of my equation. My goal is to buy a used second set of catalytic converters to be modified with new 200 cell guts, but keep the stock parts just in case I want to revert back to fully stock in the future or have trouble at visual inspection. There seem to be more 2002+ exhaust parts available and came across a 2003 set but I have a '99. 1. Do 3.6l cats bolt onto 3.4 headers without any mods required (no need for 3.6l headers)? 2. If I replace both the headers and cats from a 3.6l onto my 3.4l, will they bolt right on and all brackets fit without any mods? 3. If I have to do a swap back to the original 3.4l cats with 3.6l headers on, would they fit on the headers, or would I have to put the original 3.4l headers back on to get them to fit? For reference, I pulled part numbers for both cats and headers: Catalytic Converters: 3.4l [M96.01/.02/.04] ('98-'99 / -'99 -> '00 -> '01-) 3.4l LEFT 996-113-021-53 / 996-113-021-56 -> 996-113-031-01 -> 996-113-031-02 3.4l RIGHT 996-113-022-53 / 996-113-022-56 -> 996-113-032-01 -> 996-113-032-02 3.6l [M96.03] (2002-2005) 3.6l LEFT 996-113-031-03 3.6l RIGHT 996-113-032-03 Exhaust Manifold/Headers: 3.4l [M96.01/.02/.04] ('98-'01) 3.4l LEFT (1998-2001) 3.4l RIGHT (1998-2001) 996-111-101-52 996-111-102-52 3.6l [M96.03] (2002-2005) 3.6l LEFT 3.6l RIGHT 996-111-101-53 996-111-102-53 X51 3.6l LEFT 3.6l RIGHT 996-111-101-40 996-111-102-40 edit: Simplified part # section and added color