EPA obtained evidence that HT Performance (Respondent) sold defeat devices, products listed below which render inoperative emission control systems on EPA-certified motor vehicles. After review of HT Performance's responses to the RFI, EPA has concluded that HT Performance has sold eight defeat devices. It is a violation of Section 203(a)(3)(B) of the CAA, 42 U.S.C. 7522(a)(3)(B) to sell defeat device intended for use with EPA-certified motor vehicles and engines. Based on information summarized below, EPA finds that Respondent has committed eight violations of Section 203(a)(3) of the CAA,42 U.S.C. 7522(a)(3).