Aluminium High-Performance Head will give you performance without sacrificing style. Designed with billet aluminium, this head is made for performance engines as well as any non-performance engines. Built with a rounded and squared shape, this head cools your engine faster than standard heads while giving you 20-30% more power to your engine. This head might look small, but it packs a punch better than those round heads and most "ashtray" cylinder caps.