Looks to me like they use either some in house or unknown name core for their cats if they only charge $150 extra for it. Can't be that good of quality...
Looks like they also don't guarantee no CEL which is what you're aiming for. The only ones I know of that have that guarantee is Fabspeed and FI. Wagner also has good rate of no CEL but it's not guaranteed if I remember correctly.
There are plenty of people that have MPE and Fabspeed sport cat combo so if you're looking to hear how a 200 cell cat sounds I would just do a quick search on YouTube.
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