Is it possible to run the STi 6 speed clutch on a 5spd tranny?

Are the flywheel the same? i know the 6 speed flywheel is a bit bigger than the 5 spd if i am not mistaken?

 

Can be done yes although you will have to rout a little from your bellhousing where the flywheel catches. Dry fit and turn engine over to mark the housing where it fouls, and you will need a 6 speed starter.

 

It can be done, but if you are using the original style Subaru 6 speed clutch you'll need the original 6 speed flywheel as well. In fact the AP racing 240 mm clutch [ 6 spd type ] also needs a castellated flywheel.

This is because the clutch fits down 'inside ' the flywheel which has a number of little 'castles' around the edge. Strange thing that is next to impossible to lighten any amount worth doing.

David APi

 

As David says, it can be done but you need a 6 speed flywheel too.

They are an odd shape.

We stock forged lightweight flywheels for the 6 speed at great prices.

Drop me a PM if you need one.

 

My 5 Speed starter works fine with my 6 speed Flywheel

 

i have some pics i done done this a few months back will find them out and post up

 

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there is a little weather shield thingy at the bottom that needs bending away from the flywheel or taking off.

 

thanks guys for the great info! i would like to try the 6 spd clutch kit on my 5 speed coz i found them quite reliable even if power of the GDB has been up. I dont normally race only a occasional fun runs that why i am looking towards the 6 speed since its quite good for everyday drivings

 

Curious that, we have supplied and / or fitted about 50 x 6 speeders over the last 3 years and about half of them seem to work ok on the original starter.

In any case a small amount of fettling gets the 5 speed one to work on the 6 speed most times. in our experience.

Perhaps it is because most of ours are JDM ones which are not the same as UK ones just in the starter area.

David

 

I had to trim my RA V2 starter motor slightly in order to fit properly on the 6 speed box, is it because earlier V1 & V2 starter motors are slightly bigger than later models .