Ok, There is a dubious way of making a C4 resemble a C5.
Why is there not a way to go the other direction?
Arguably the C4 is more angular, thinner, less bloated, and a bit more nostalgic for the 1980s and 90s, for the Radwood crowd.
Frankly, I like the combination of sharp lines and hewn curves a bit more than the C5's slight bloat, and generous posterior.
But C5 has the mechanical superiority hands down. The hydroformed chassis, the suspension, the rear mounted transaxle, and the LS-family engines are all big pros in the C5 and C6 columns over the C4.
So where is the body kit that will give the C5 a Radwood makeover for those slick 1980s looks?
And bring back the early C4 aerodisc style wheels, too... maybe with a bit of concave like the slotted mags on the later C3...