Engine power was slightly increased to 310 horsepower thanks to a cold air intake, high flow performance exhaust, and a retuned ECU. This WRX STI Type RA is #145 out of 500 produced, according to a plaque on the center console. Power comes from an EJ257 2.5-liter turbocharged flat-4, rated at 310 horsepower and 290 lb-ft of torque in stock form. Bid for the chance to own a 1995 Subaru Impreza WRX STi Type RA at auction with Bring a Trailer, the home of the best vintage and classic cars online. Lot #67,681. The RA designation stands for "Record Attempt" and has been applied to various Subaru performance models. The original venture took place in 1989 when a competition version Subaru Legacy broke the FIA World Speed Endurance Record by clocking over 62,000 miles in 18 days and set a top speed record of 138 mph. Furthering this spirit of endeavor, a special race model WRX STI Type RA NBR Special JDM Subaru Impreza WRX STI R & RA Version 5-6 GC8 Item ID 4530 Model(s) Sold. 4.11 LSD Rear Differential & JDM 5 Speed Manual Transmission Item ID 4475 JDM Push Type 5 Speed Transmission Swap For Sale with Item ID 3471 Model(s) WRX 2006-2007. Sold. USDM TY754VV4AA 5MT WRX 2002-2005 Replacement Transmission, Item ID 3470 Model(s) pl8lOS.