Catalytic converter without support arms, GT4 Options

[skogs]

I need to reinstall the main cat, but i dont have the two support arms. Is it a bad idea to go ahead anyway?

[Bitter]

I don't have first hand experience, but it's not just the weight but also the rocking of the engine back and forth tugging on the exhaust, turbo, and manifold that you need to consider. Those brackets seem fairly important if they're made of cast iron on a GT4. You should try to fabricate some kind of support bracketry or track down some OE ones, it would be a shame to damage your turbo, manifold, or new piping.