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Since in my case I had both the ProBeam and the BackBone done my experience is quite different from yours.
The suspension on my 2007 GXP is now as good as the ZOK.
I did my test on the same track and with the above products the car can take the same turns at a higher speeds. The car could not do this before the update.
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Aggressive GXP at $25,995.00 shipping of $600, MT.
Options:
Air, $960; Chrome Wheels, $545; PCQ, Premium Package (Leather), $525; Radio, 6-Disc with MP3, $495; Monsoon, $395; Premium Acoustic Headliner, $150; and Sport Metallic Pedals, $115; all totals $29,180.00.
No XM/OnStar and NO Spoiler.
MODS (Magnaflow 2.5", BTF Turbo Upgrade wheel,DDM BB,ProBean&tune, K&N filter, Ventureshield.
First 1000. Aggressive with everything, NO XM/OnStar. SOLD
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NASSOA
Founding member
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