Modifications!
I love modifying things. It's a compulsion. Every car and motorcycle I've owned has been modded in one way or another. With this 240z, certain mods are must-haves.
An air dam forces air to go around the car instead of underneath, where it can cause turbulence, which in turn can reduce the top speed. It also has an agressive appearance. I don't expect to need the type of performance an air dam provides, so I'm really only adding it for the right "look." Some air dams come with cooling vents for the brakes, but I prefer this smooth version.
A spoiler quite literally "spoils" the flow of air over the back and keeps the rear end firmly planted for better handling. I love the style but have to admit it'll only provide useful downforce above 100 mph.
Strut towers flex during hard cornering, especially when the metal is this old. A brace ties the towers together for better strength. Unlike the air dam and spoiler, this modification will help during day-to-day driving when a texting soccer mom's minivan blows through a red light and I swerve wildly to keep from being hit.
I added spot welds to reinforce the towers themselves. They were only pinch-welded at the factor so years of flexing can loosen them up. Most of them time the welds themselves are longer but I was a little nervous about blowing holes thru the metal so I opted for a closely-spaced pattern of spot welds. It's not the optimal way but should help.
A roll bar isn't really needed for day-to-day driving, but if I get hit or somehow lose control, and the car flips over, the bar could be a lifesaver. The kit came in pieces and will need a fair amount of fabrication to fit right, but once it's done I'll have another great upgrade.