They are out of TX and the prices on there O.E.M. style direct fit cats are outstanding. My 07 XKR right side cat is in need of attention so I am working on a 200 cell upgrade with a forum vendor but with some forum members experiencing issue's with codes on their XJ's I started to see what other options may be out there. I ran across these guys info@convertorwarehouse.com and can't believe the pricing. Has anybody used any of their products? I would really like to stick with my plans to go with a 200 cell upgrade but a bolt on stock unit for $300.00 is hard to not consider. What say you.

 

200 cell cats are proven to increase hp but at a cost which is the increased sound and fuel consumption in my case

If you don't mind the extra sound go for it as far as the codes coming up I've only had them appear twice both times on the freeway in the space of a year and I cleared then with my obd11 scanner ( mind you I have 100 cel)

However if your paranoid any good dyno tuning shop will be able to permanently switch them off

 

Future plans to upgrade to a twin screw dictate that I still go with the 200 cell cats. However right now I am unable to use the car as is and a twin screw still a ways off it's hard not to consider for the interim. How is the drone of the exhaust with the 100 cell cats?

 

The drone is not present I've got the outer exhaust pipes (the ones with the valves inside) manually set in the half open position

The sound is a lot closer to a Aston now , even if that's too loud you can manually shut them completely I've tried this and yes it sounded great but the way it is set up now soundwise is perfect

 

I purchased a cat converter from them about a year ago for a student friend's Subaru. Seemed like a good quality product and she passed the smog with it, cleared all codes. The only thing the converter did not come with were the heat shields that were on the original cat.