Rev counter needle changes colour at points in the rev range - like the Maserati MC12 and another car im sure: -
http://www.demon-tweeks.com/products/ProductDetail.asp?cls=MSPORT&pcode=P/ED-100-12K&vat=inc
http://www.demon-tweeks.com/products/ProductDetail.asp?cls=MSPORT&pcode=P/ED-100-12K&vat=inc