The McLaren 650s option list/ prices.
Some of these are eye watering. £4790 for a 'sports exhaust' on a £215,000 car. Absolute madness.

2nd page.

When you can afford a 215,000 pound car, you generally don’t care if the exhaust costs 5000 pounds

Chances are if you can buy a 650s, 5000£ is pocket change