The TTY is to make the area stiff. I'm also thinking that if you snag something, you don't go tearing out prices of subframe, the bolts should give. I think. Not sure myself on this. I too don't fully get the point of TTY bolts here.

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2006 4.8is, Black on White. SOLD Sniff Sniff.

2017 F85 x5m, Black on Red. BEAST MODE


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