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Hi,
I fitted pre 86 944 Turbo rotors and later calipers to my ball joint front end. It widens the track by 26mm either side even with stock spindles so I had to narrow the beam by 2 inches. I bolted up 7.5j 52ET Porsche wheels without a spacer and everything fits beautifully. No rubbing and the front is very low. With the later 944 rotor setup the hats increase the track even more. You may have to narrow your beam by 2.5 inches and do some minor bodywork to the inner wings.
As for the back... The 944 brake conversion and IRS has increased my track width by about and inch either side. Even with 52ET (maximum offset for my Porsche rims) the rear wheels won't fit under stock arches. I'm going to have to cut and shut the rear trailing arms and have the axles shortened. Again the later brakes increase the width even more if i'm not mistaken.
At the end of the day it's your choice, but it's going to be harder to fit the later parts under stock wings.
Good luck and let us know how you get on.
Andy.
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'55 oval GL
944T Calipers and discs front & rear.
17" Turbo rims 205/40 front, 215/45
rears
230BHP TIV fuel injected.
IRS+Berg 5 speed box.
Build in progress.
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