My del slow cant pass emissions... HC's and nox... but my timing is perfect and the O2 sensor is fine to my knowlege (though the idle is a TINY bit weird, so hell, ill probably just swap that out anyways), so it looks like its a combination of the shitty universal cat and carbon buildup in my cylinder heads. im gonna seafoam the B16, but i also need to get an OE-style cat. Partstrain.com has been recommended to me... they carry direct-fit cats from Eastern, Catco, Bosal, Walker, and Miller. Wondering which if any of these is gonna be my best bet as far as a reputable brand is gonna be concerned. Any experience/recommendations? Thanks in advance.