Okay, I have two options for adding a hi-flow cat to an Invidia N1 exhaust (and Invidia DP) and I need some help deciding.

1.) Pay $65 for a used BR cat. It has the slip joint on one end, so I'll need to have a flange welded on.

2.) Get this FREE univeral Magnaflow cat from a friend (http://magnaflow.performance-curve.c...PROD&ProdID=26). I'd have to have flanges welded to both ends. Does anyone run this cat? I don't know if it'll fit under an EVO... it doesn't look very big, but I'm not willing to cut up my Invidia to make it fit.

Does anyone know the dimension of the stock cat?

Any idea which one flows better?

Rob