... other precious metals and rare earth elements of the compound catalyst. 2. Catalyst substrate: Honeycomb ceramic substrate, metal substrate. 3. Excellent ... design.7.Can meet Euro3,Euro4 or CARB,EPA standard. passing through the strict test of endurance, our motorcycle catalyst converter ... and have approval of EPA and E-Mark. 1.catalyst type: complex catalyst of noble metal (Pt, Pd, Rh) plus rare ...