R-tech is very good ,nick came to me in banstead,surrey .Put stage 1 map on my agu and even cleaned my throttle body.Made a hell of a difference.At first i wasnt happy but it was a fault cam shaft sensor.

After i got a new one its a monster.

with my little mods ,home made air filter

007 dv ,ngk platinum spark plugs and upgraded pancake pipe.Oh and a bit of light lighter, lol ,if it dont work throw it away.