I think we can put the rumor to rest as to the FP350S having GT4 type rear controller arms.
First of all, the IRS sub frame Ford Engineering Part number from the BOM is FR3V-5K067-CD. The Ford Service Part Number for that is FR3Z-5035-D. Levittown Ford has it for $1,057.39 so it has been released. I can’t find a cross reference for use in any other Mustang. Unfortunately can’t see as of when it was released date wise.
The GT350 and GT350R both use FR3Z-5035-E.
Since it’s a Ford Part Number and not Ford Performance, I don’t believe that it’s the FP one with aluminum bushing already installed.
On the rear lower controller arms, the Engineering Part number for the left side from the BOM is FR3C-5K652-AD – a new part and not yet in the Ford System – or – not yet released.
On the rear lower controller arms, the Engineering Part number for the right side from the BOM is FR3C-5K651-AD – a new part and not yet in the Ford System – or – not yet released.
Since both are Ford Part Numbers, I think that these parts will be high volume parts and not just 50 being produced for the FP350S. Possibly 2019 GT500 parts?
These pictures are from the video that American Muscle made:
First one is from the back while a FP350S was up on the rack. Looks like an aluminum casting to me.
This next one is a little blurry but you can clearly see the lower spring perch. BTW, you can also make out the 2pc drive shaft. You can see the middle bearing / holder
So the new IRS is new and so are the controller arms. Question is what did they change? Obviously must be good changes or else they wouldn't have put them into the 350S
First of all, the IRS sub frame Ford Engineering Part number from the BOM is FR3V-5K067-CD. The Ford Service Part Number for that is FR3Z-5035-D. Levittown Ford has it for $1,057.39 so it has been released. I can’t find a cross reference for use in any other Mustang. Unfortunately can’t see as of when it was released date wise.
The GT350 and GT350R both use FR3Z-5035-E.
Since it’s a Ford Part Number and not Ford Performance, I don’t believe that it’s the FP one with aluminum bushing already installed.
On the rear lower controller arms, the Engineering Part number for the left side from the BOM is FR3C-5K652-AD – a new part and not yet in the Ford System – or – not yet released.
On the rear lower controller arms, the Engineering Part number for the right side from the BOM is FR3C-5K651-AD – a new part and not yet in the Ford System – or – not yet released.
Since both are Ford Part Numbers, I think that these parts will be high volume parts and not just 50 being produced for the FP350S. Possibly 2019 GT500 parts?
These pictures are from the video that American Muscle made:
First one is from the back while a FP350S was up on the rack. Looks like an aluminum casting to me.
This next one is a little blurry but you can clearly see the lower spring perch. BTW, you can also make out the 2pc drive shaft. You can see the middle bearing / holder
So the new IRS is new and so are the controller arms. Question is what did they change? Obviously must be good changes or else they wouldn't have put them into the 350S
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