HKS DDR (Direct Deposit Remover) Fuel System Cleaner is a high concentration hyper polyether amine (PEA) deposit remover. Provides exceptional cleaning throughout the entire fuel system and combustion chamber helping to restore lost power and performance caused by deposit build-up. Applicable for all gasoline engines including normal port injection, direct injection, carburetor and rotary engine. 225ml bottle. 100% genuine HKS product. Part# 52006-AK003. Made by HKS Co., Ltd. Japan.