You only need 5 but the 6 pack is cheaper. In a perfect world I would go with a Kartboy though. I’m NOT going to get a short throw shifter as it looks like a huge pain. If you decide to do them, here’s a great deal I found on 6qts. I see that Cobb has a shifting stage 1 package for 150 that comes with a Cobb brass bushing, shift stop. You don’t even have to jack up the car to do that one. You should do the rear differential at the same time with the same fluid and that one only takes 10 minutes total because it only holds a quart of fluid. This kit completely replaces your factory shifter mechanism, and will also restore any excessive. Took me like 20 minutes if you don’t count the time waiting for it to drain, which surprisingly took like 30 minutes for it to finally stop dripping out. Cobb 02-07 Subaru WRX 5sp (w/o Factory Short Shifter). Fits 2004-2020 Subaru STIThis is the Kartboy short shifter and bushing combo for the Subaru STI. Same process as an oil change, drain and refill. What convinced me to switch is that people have been running the Motul fluid in Subaru transmissions for decades without issue so real world use says it’s plenty safe. Basically, it performs better and lasts longer. It just has a different cocktail of chemical additives that provides better lubricity and protection, and prevents premature breakdown of the fluid. COBB 5 Speed Double Adjustable Short Throw Shifter - Narrow Barrel for Subaru WRX 2002-2007 135.00 Designed using CAD technology, the COBB Black anodized billet shifter body is CNC machined from 6061 Aluminum. I run an old kartboy knob that is just heavy enough to be easy to shift but Boomba Racing Round Shift Knob 270G 04-14 Subaru Impreza, 07-09 Legacy, 15-20 WRX Boomba Racing Short Throw Weighted Shift Knob Black 2015-2020 14 de fev. The Motul is the same weight and certification as the OEM fluid, so it’s probably 97% the exact same thing.
It’s good to ask questions though, so props for that.