You'd think the single most expensive part of the Underground GTO might be the Carbon Clutch, or maybe the modified DR Stage 3 Heads. If you were thinking the Autronic SM4 you'd be close or even the carbon prop would be a good guess.Turns out it's actually the windscreen - Autoglass took £3, 284.72 for a replacement screen last week - thankfully we only had to pay the excess and the insurance company took care of the rest.







