P0420 tripped after installing oil catch can, but could also be the Dynatech long tube headers and Dynatech high-flow cats that caused this. Either replace the included stock tubing to PCV, etc., or use a non-updated SCTX3 to do "you know what" to the rear O2's. Pics show the worst, expect everything else to be in perfect working order, and/or replaced with new parts. Just under 143k miles. I will not negotiate the price, nor do I want to trade. I can provide more details on the ton of work I've done, but no engine/trans internals were touched. Clean title