98SubaruLegacy Posted February 29, 2016 Share Posted February 29, 2016 I'm going to be building a 2.5l hybrid with 272 cams. Will a 2005 impreza wrx still 5 speed transmission fit up under my legacy? Link to comment Share on other sites More sharing options...
wtdash Posted February 29, 2016 Share Posted February 29, 2016 (edited) If you're NOT adding a turbo or other FI (forced induction) your stock 5-speed is adequate, as it'll hold 250hp/torque as it did on my '98 Forester turbo project. But it depends on how you drive it.....even the WRX won't last if you're launching/clutch dumping it. But if you go w/the WRX, yes it'll bolt up - you may need the rear diff, too as it's a 3.54 FD ratio...actually, it's a weird 1.1:1. Subarus w/the 2.5 were 4.11; '96-'99. 2.2 were 3.9. And I believe the WRX is a PULL type clutch and the '98 is a PUSH so you'll need the compatible clutch/FW/TO bearing, etc. Not sure if the master/slave clutch cylinders will work. You may also have issues w/the speedo - around '05 Subaru went away from the trans-mounted Speedo. GL, TD Edited February 29, 2016 by wtdash Link to comment Share on other sites More sharing options...
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