aftermarket

I need to replace the Manifold/Cat combo on my 2014 Jeep Cherokee sport 4X4. It was built for California emissions specs as I purchased it in CA but since I now live in TN. will it be okay to get a cheaper aftermarket manifold/cat to install or do I have to go OEM? One mechanic here in TN...

Hi gang, It's been a long while since I last posted and I'm hoping to find the correct Radiator Overfill Tank for 'Black Betty' she's a 1978 CJ5 with a 360 (read 304) motor and while it has an aftermarket dingus on the radiator support, it lacks a Pickup Tube as many of the aftermarket ones...