ive gt the same problem as u, im 17, got a mk2 1.6 driver, its got GTi interior, GTi suspension, front spoiler and new light clusters.
Im not gonna declare my interior, cos they will only cover it fully comp, which is 2700. or GTi suspension, also fully comp, and so is front spoiler!
Im only declaring lights, and soon air filter. they dnt put ur insurance up, im going 3rd aprty fire and theft and i got quaoted £1683.40 inc windscreen cover. go on
www.17to40.co.uk