Made from billet aluminum, Factory Pro Superflare Velocity stacks have a claimed power boost of 2 to 6 “true” horsepower as measured by an EC997 Dynamometer. By optimizing airflow with an improved inlet radius, you can expect better throttle response from your motorcycle after installation. These velocity stacks require no special tools to install. Available for 2006-2007 Kawasaki ZX10R Call TJ at 866.931.6644 ext 817 to have a complete set of velocity stacks sent to you today. You can also email him regarding availability – send those to FORUM at RIDERSDISCOUNT dot COM with FP VSTACK in the subject line along with the make and model of your bike and we’ll get back to you right away. http://www.ridersdiscount.com/forum/factory_pro/velocity_stacks_factory_pro_gsxr_1000_k7_2.jpg http://www.ridersdiscount.com/forum/factory_pro/velocity_stacks_factory_pro_gsxr_1000_k7_3.jpg http://www.ridersdiscount.com/forum/factory_pro/velocity_stacks_factory_pro_gsxr_1000_k7_1.jpg