I just ordered a forge DV004 and have a few Q's about the springs.

On ebay the springs are much cheaper than forge website and the seller on ebay is named 'Forge factory shop', I'm guessing they are not genuine forge? http://www.ebay.co.uk/itm/FORGE-MOTORSPO...=item3cd5be8b84

http://www.forgemotorsport.co.uk/Uprated_Dump_Valve_Spring_Single--product--825.html

Also I'm aware I need the yellow spring but then I noticed they sell small springs too, so will I need to buy the yellow small spring to go with the yellow normal spring?

Thanks