Resonance tuning - sounds like a bit of a gimmick when you first read it, huh? Air flowing through exhaust piping is all headed one way, and from what we've all come to know, the faster you can get it ...

Fork out a few hundred quid on a little black tuning box and you could unleash a healthy dollop of extra power and torque from your tractor. Sounds tempting, doesn’t it? But what are the risks? Will ...