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Intro: There have been instances on track, where a very hard hit to a curb can cause the aluminum strut tower to shatter. I believe this is exacerbated by stiffer springs and high damping along with higher than stock camber adjustments. Porsche motorsports added a top plate with their 981 GT4 Clubsport cars by building this part. I run track days, I have max stock camber (-1.5) and I plan to install camber plates and adjustable track shocks in the future. Can this prevent failure? Maybe? Can this prevent a catastrophic failure where lots of other parts are damaged? (Hood, lower frame, fender, etc) Possibly? Having built and raced rally cars - reinforcing and plating the strut tops is a standard practice for chassis longevity. This is cheap insurance.
Buyer beware: There are companies that are getting these plates and adding two spacers, two long bolts, and selling them for three to four times the original price. These are a Porsche Motorsport part with a Porsche part number stamped on them. I was able to get these shipped FedEx to me with tax and duty from the UK to USA for $272 from Eurospares.
Strut-Plates.png (879.73 KiB) Viewed 941 times
Porsche Part numbers are: 9915042848A
9815042838A
Hardware:
2x 60mm (ID 11mm) spacers
2x (Grade 12) M10 x 1.5 -75mm long bolts w/ nuts
strut-right.jpg (519.16 KiB) Viewed 941 times
strut-left.jpg (588.91 KiB) Viewed 941 times
strut-hardware.jpg (343.96 KiB) Viewed 941 times
It takes a little bit of plastic / rubber trim cutting as they were designed for race cars with none of it. You have to remove the fender liners to access the side bolts from underneath. I also whipped up an aluminum bracket for the wiper fluid cap.