I got a cat underperforming code and would like to know how many cats does an 05 Bonneville GXP have and where are they located. Also how hard to remove? I am familiar with the options. Legal 1 replace 2 clean either with gas additive or removal and soaking. Not legal but not obvious to the casual observer so will pass state inspection most of the time. 1. O2 spacer 2. Gut the cats and 02 spacer. Totally illegal and will fail state inspection without accompanying case of beer, and even then probably not. Cat delete.

Of course the only options anyone should consider are the cleaning or replacement. That is why I would like to know where they are and how hard to remove ( and replace). Thanks

1 cat, mounted at the bottom of the downpipe. It has a rectangular flange on the front side with 4 bolts. It's pretty easy to see if you just look under the car. The rear of the cat must be welded in if you're getting it replaced.

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Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 55k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 95k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 260k | Official Bonneville Hauler

Thanks. Just got the car and have not had a chance to put it up on ramps to look at it.