Do yourself a favour and get the Ace DS1313 13kg or the DS1015 15kg.
the DS1313 is perfect for buggy steering and throttle.
After my KO Fet steering servo melted I fitted a Ace DS1015 as they where the only servos available at the track at the time.
Really blown away by its performance ,lately most of teh top drivers have all changed to Ace DS1015 steering and DS1313 throttle.
Not badly priced too ,seeing they out performing the Airtronics and Hitech big boys.
A big plus for me has also been that the are water proof too.