Berk Technology 00-09 Honda S2000 63.5mm HFCFeaturing Magnaflow's new metallic substrate core. Less weight, more durability, and higher flow than your standard ceramic substrate "high flow cat". Do not confuse these with cheap Chinese made ceramic substrate versions! These are very high quality parts made proudly in the USA by our expert fabricators. Our test data shows that this cat flows 87% as well as a test pipe vs. 43% for the OEM Cat. High flow and no test pipe smell. You can have the