The market is becoming thinner and thinner when it comes to D series parts up for sale. A lot of the name brands companies have discontinued the production of SOHC parts. Some people cant afford a B16/B18/H22/F22, or just love their SOHC. Im looking to compile a list of good name companies that still make or sell Performance SOHC parts. Sadly Skunk2, and Crower are out of the picture, and our friends at SwapShop Racing stopped making D series parts as well. Lets band together d Series/SOHC owners! LIST: Head Supertech (Valves, Springs, Retainers, Seals, Guides) KMS (Springs,Valves, Retainers, Seals) AEM (Cam Gears) Bisimoto (Cams, Cam Gears, Springs, Retainers) Zex/Comp Cams (Cams, Springs, Retainers) Ferrea (Valves) Edelbrock (Cam Gears) Blox (Springs, Valves, Cams) Blackworks (Valves) Crane (Cams) Skunk2 (Cam Gears) Crower (Cams, Rods, Springs, Retainers) Fidanza (Cam Gears) Bottom End Wiseco (Pistons) Nippon (Pistons) SRP (Pistons) CP (Pistons) Arias (Pistons) Eagle (Rods, Cranks) YCP/NPR (Pistons) Help add to the list, If you know of or use any brands that are still in service and continue manufacturing, Post it!