Anyone running without Cats???

[Chef]

Well I've removed the cat on my grand prix and just added an O2 simulator. Not sure about performance gains as I was modding the supercharger at the same time, but it was def. louder.

I was just wondering if anyone had done it on the VX since the grand prix community is all about modding.

[mbeach]

A high-flow catalytic convertor will serve better than no cats at all -especially in this normally-aspirated truck. Now with a turbo, it's all about exhaust flow, and 'test pipes' are all the rage.

I say look into a Random Technologies or CatCo unit, and spare yourself the trouble of fabbing a CEL eliminator for each of the after-cat O2 sensors.

[Cyrk]

MachineVX is running magnaflow cats.

I might try these since I am going to try and replace my Powervault Catback with a new 3 inch exhaust, from my local speed shop.