We have yet to meet anyone who doesn’t like free parts. The best parts to get for your performance vehicles are the ones you get for free. Unfortunately, it’s not too often a manufacturer wants to throw around free parts.

Whiteline’s roll center bump steer kit rebate offer applies to the Ford Mustang, Subaru Impreza WRX/STI, Mitsubishi Evo, and Scion FRS/Subaru BRZ. The roll center bump steer kit not helps on the open track, it also helps overall handling on the street, as well.

Well, Whiteline US is offering a $100 parts rebate for consumers who purchase a roll center bump steer kit from one of its dealers. Here’s how it works; you buy a roll center bump steer kit between now and August 31st, 2015, and Whiteline will reward you with a free rebate on any of its products under $100. The link to the rebate to be filled out is right here.

So you might be asking why your car needs a roll center bump steer kit. On many cars, when they are lowered, the change affects steering geometry because a car’s lower center of gravity raises the outer tie rod ends. Whiteline’s roll center bump steer kit uses its specially-engineered ball-joints and tie rod ends to restore original steering geometry.

Whiteline’s roll center bump steer kit is designed to improve weight distribution, and maintain a better camber angle, which improves front grip. The overall outcome, Whiteline says, is reduced understeer, and improved steering geometry and vehicle stability.

And don’t forget the $100 rebate.