rear springs.....
 

hi people, i have just took my mates new car to rebuild it,that he brought of ebay, a ex Darren Potter car, but the funny thing i found was on the rear suspension, that was the normal rear spring, but also a smaller spring as well, its shorter then the front springs, what is this for and does it work?........

its stiffens the last few mm of travel forcing the opposite wheel to grip the track almost like an anti roll bar i think anyway