If all you want is to upgrade the gear, here is what is needed for 2008-2014 vehicles.
Actual parts needed:
34110VA120: Perry Subaru Subaru Gear Assembly 34110VA120 | The Subaru Source These guys have a promo code WE-STI that is still good 6/27/2018
OPTIONAL PARTS(links below as well):
-SR Rack Bushings
-Cusco steering rack brace: CUS 692 026 ALHD
-They also offer a combo of both which is a tad cheaper
Statement from Noximus:
You are NOT obligated to do the bushings and brace. They're an upgrade for the stock bushings and brace, but they are NOT required. They are simply easier and more convenient to do while you have the rack out of the car. I decided to do them because they were on my build list before this endeavor.
The following is from post 132 after the installation. Just for informational purposes.
I did however leave the diagrams left 2015 and right 2011 GR. Of-course a diagram is not to be used for fitment reference.
Compared some other parts.
2013-----------------------------------2015
34430FG040------ PUMP-POWER STEERING ---- 34430FG040 Same
34160XA000------ TIE ROD COMPLETE Outer--- 34160XA000 same
34166AG050------ CLAMP-GEAR BOX PINION---- 34166AG030 not
34161SA001------TIE ROD END ASSEMBLY------34161SA001 same
34115AG010------rack bushing-----------------34115AG010 same means same diameter tube
34166AG030-------CLAMP for rack bushing -----34166AG050 different consistent with different body
34170FG011------UNIVERSAL JOINT ASS--------34170VA030 not but may just be longer shouldn't be required for swap
901000372-------FLANGE BOLT Mounting--------901000372 same mounting bolts
Subaru 2015 STI steering rack: 34110VA120 (OEM Part Number 34110VA120 from Subaru - subarupartsheadquarters
Some installation tips for DIYers.
Tip: Use seat belt to lock steering wheel and keep it from turning full rotation potentially damaging your clock spring.
Tip: Dont remove the u-joint. Simply loosen top retaining bolt and slide it UP the steering column out of the way. Then snug up the bolt to keep it from falling down. Let it hang.
Tip: Always make sure the rack is centered before hooking up the u-joint. To do so by either count rotations or look at marks on the gear. If tool is not available have a buddy hold the steering wheel dead center while you connect the u joint.
Tip: If everything is bolted down, wheels are pointing straight, steering wheels is straight but amount of threads on each tie rod is different the rack is NOT centered. Do not proceed, correct the error.
Tip: Once all is bolted up and done; With front wheels off the ground fill reservoir to hot line and turn rack left to right lock to lock(engine off). Do about 20 rotations or until no more audible bubbles are coming from the reservoir. They will be heard at the end of each stroke. This will keep your pump run air free when you first fire it up. Once running wheels off floor(no load) repeat bleeding procedure several times or until pump is fully silent.During this process fluid level will drop, top off as it goes down.
Tip: If your drive to the alignment shop is considerable you may follow this basic thread counting measure. It is offered as a guideline and is not a replacement for actual alignment. On a FACTORY UNMODIFIED ride highth GR you should end up with about 11-13 threads on each tie rod. Each thread being the "high" point of visible inner tie rod thread.
After install Bleeding Tip:
Originally Posted by Ej_Al
Tip: Once all is bolted up and done; With front wheels off the ground fill reservoir to hot line and turn rack left to right lock to lock(engine off). Do about 20 rotations or until no more audible bubbles are coming from the reservoir. They will be heard at the end of each stroke. This will keep your pump run air free when you first fire it up. Once running wheels off floor(no load) repeat bleeding procedure several times or until pump is fully silent. During this process fluid level will drop, top off as it goes down.
Steering rack replacement additional information => Steering Rack Replacement DIY
Actual parts needed:
34110VA120: Perry Subaru Subaru Gear Assembly 34110VA120 | The Subaru Source These guys have a promo code WE-STI that is still good 6/27/2018
OPTIONAL PARTS(links below as well):
-SR Rack Bushings
-Cusco steering rack brace: CUS 692 026 ALHD
-They also offer a combo of both which is a tad cheaper
Statement from Noximus:
You are NOT obligated to do the bushings and brace. They're an upgrade for the stock bushings and brace, but they are NOT required. They are simply easier and more convenient to do while you have the rack out of the car. I decided to do them because they were on my build list before this endeavor.
The following is from post 132 after the installation. Just for informational purposes.
I did however leave the diagrams left 2015 and right 2011 GR. Of-course a diagram is not to be used for fitment reference.
Compared some other parts.
2013-----------------------------------2015
34430FG040------ PUMP-POWER STEERING ---- 34430FG040 Same
34160XA000------ TIE ROD COMPLETE Outer--- 34160XA000 same
34166AG050------ CLAMP-GEAR BOX PINION---- 34166AG030 not
34161SA001------TIE ROD END ASSEMBLY------34161SA001 same
34115AG010------rack bushing-----------------34115AG010 same means same diameter tube
34166AG030-------CLAMP for rack bushing -----34166AG050 different consistent with different body
34170FG011------UNIVERSAL JOINT ASS--------34170VA030 not but may just be longer shouldn't be required for swap
901000372-------FLANGE BOLT Mounting--------901000372 same mounting bolts
Subaru 2015 STI steering rack: 34110VA120 (OEM Part Number 34110VA120 from Subaru - subarupartsheadquarters
Some installation tips for DIYers.
Tip: Use seat belt to lock steering wheel and keep it from turning full rotation potentially damaging your clock spring.
Tip: Dont remove the u-joint. Simply loosen top retaining bolt and slide it UP the steering column out of the way. Then snug up the bolt to keep it from falling down. Let it hang.
Tip: Always make sure the rack is centered before hooking up the u-joint. To do so by either count rotations or look at marks on the gear. If tool is not available have a buddy hold the steering wheel dead center while you connect the u joint.
Tip: If everything is bolted down, wheels are pointing straight, steering wheels is straight but amount of threads on each tie rod is different the rack is NOT centered. Do not proceed, correct the error.
Tip: Once all is bolted up and done; With front wheels off the ground fill reservoir to hot line and turn rack left to right lock to lock(engine off). Do about 20 rotations or until no more audible bubbles are coming from the reservoir. They will be heard at the end of each stroke. This will keep your pump run air free when you first fire it up. Once running wheels off floor(no load) repeat bleeding procedure several times or until pump is fully silent.During this process fluid level will drop, top off as it goes down.
Tip: If your drive to the alignment shop is considerable you may follow this basic thread counting measure. It is offered as a guideline and is not a replacement for actual alignment. On a FACTORY UNMODIFIED ride highth GR you should end up with about 11-13 threads on each tie rod. Each thread being the "high" point of visible inner tie rod thread.
After install Bleeding Tip:
Originally Posted by Ej_Al
Tip: Once all is bolted up and done; With front wheels off the ground fill reservoir to hot line and turn rack left to right lock to lock(engine off). Do about 20 rotations or until no more audible bubbles are coming from the reservoir. They will be heard at the end of each stroke. This will keep your pump run air free when you first fire it up. Once running wheels off floor(no load) repeat bleeding procedure several times or until pump is fully silent. During this process fluid level will drop, top off as it goes down.
Steering rack replacement additional information => Steering Rack Replacement DIY