vectra's also have heavy fly wheels. they weigh 15kg and it does hamper the performance. i have a 3.0 converted vectra and really needs a lightened flywheel. Is the car a pre facelift or facelift. if it's a pre facelift then it'll have a f25 gearbox which isn't the best geared box. the f23 found in facelift cars is a much better box though.