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Sorry forgot to mention they will only fit IS250/350 RC350
The item numbers are different for IS250 (925001) vs IS350 (935001) vs RC350 (143501)...which one is it? Also is it the polished ceramic coating or the black ceramic coating? Formed collector with spike or parallel merge collector?
If this is for the IS350, I could see it fitting all the 350 engines, but I believe the 250 is going to be slightly different. Not sure it would fit those engines, but I'm no expert. Hopefully someone else can chime in.
i'm pretty sure without the o2 conditioners you would get the CEL light for the primary catalytic converters. So O2 would have to be purchase from PPE in order for these headers to work properly.