H&D Racing  link kits are designed to raise and improve the performance of the rear suspension of the Montesa 315. They are machined out of strong aero grade alluminium and also increase travel and can improve grip and rear end traction whilst eliminating some of the suspension  'sag'. The increase in travel uprates the soft rear end and aids the ability to 'trick' ride and hop around the rear end by providing an even more progressive shock.  Whilst the coloured versions provide that extra bling. 
Price is for a pair.
Other colours upon request.