See the Random high flow Y-pipe on the link below. You might still need the SLP adapter kit? I don't know of anyone that sells just hiflow cats for the dual cat LT1s as they have an odd bend on the drivers side. Only thing I've seen high flow is the complete Y-pipe.
http://www.thunderracing.com/catalog...&vid=4&pcid=99
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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