Six Speed Swapping you GD/GC Impreza

I have got a lot of questions about the technical side of transmission swapping my wagon. So I will explain the ways you can go about doing it with approximate budgets for each swap.

Full STi coversion , SWAP EVERYTHING

This is the route I took and I am very happy with how it turned out. I bought an entire swap kit from JDM Racing motors in spring of 2013. This included the following

  • Six Speed transmission
  • R180 Differential
  • Driveshaft
  • Control arms
  • Lateral links
  • Hubs
  • Brembos
  • Rotors
  • Dust shields
  • Starter
  • Clutch Slave
  • Clutch Kit
  • Flywheel
  • Axles

What I had to use from my Wrx

  • Differential support girdle
  • Differential mount wishbone
  • ABS Sensors
  • Ebrake cable
  • Struts

What I had to buy new

  • Group N Six Speed trans mount
  • Brake Pads
  • Brembo rebuild kit
  • Motul Trans Fluid
  • ATE Brake Fluid

It took an entire weekend to get done.


You must get a 5×100 transmission package if you want to keep your struts / 5×100 wheel setup. Brembos can also be swapped out for FHI 4 pot calipers if needed or due to budget.


Total Cost = Approximately $3900-$4000

Cheap Way

This involves running a Six speed with an automatic impreza driveshaft and R160.

What you need

  • Six Speed Transmission
  • Clutch kit
  • Flywheel
  • Automatic Impreza drive shaft
  • 3.90 R160 if using JDM STi trans or 2004-2006 USDM Trans
  • 3.54 R160 if using 2006+ USDM STi trans

Total Cost = Approximately $2500-$3000 depending on transmission price

The plus side is you would not have to touch the hubs , axles or other components.

The downside is that the Wrx components are weaker and are your new point of failure.

I think that covers both of the ways to do this swap , I personally always suggest doing the full swap to get the strongest possible setup so that you never have to replace differentials again.

Some pictures from my swap


swap swap 15 swap 14 swap 13 swap 12 swap 11 swap 10 swap 9 swap 8 swap 7 swap 6 swap 4

– Joey

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