We then clamp each cylinder into our specially designed fixture with a torque plate and bore it in a precision CNC Machine (see the video below). For the ultimate in performance and longevity, frezka na drevo pick up a set of Sledge Hammer Pistons when you get your cylinders bored and honed. HAMMER PERFORMANCE has developed a 4-axis CNC process to perform this critical task that does a perfect job first time, every time! At HAMMER PERFORMANCE, we've got a fixture and a CNC program that does a PERFECT job every time. Computer designed and then CNC machined from a solid chunk of 6061T6 billet aluminum, these manifolds deliver maximum flow which translates directly into more TORQUE and POWER for your hot rod Sportster. Designed for Maximum Torque and Horsepower! Achieving those things though takes a combination of equipment, knowledge, and experience. At HAMMER PERFORMANCE, we have the tools, knowledge, and experience to do every procedure correctly, from truing your flywheel assembly to clearancing your cam boxes. Years of racing experience between the two of us has resulted in a huge knowledge base of what works, and more importantly, what doesn't, and when you buy from Hammer Performance you get the benefit of all that experience.

A must for high performance projects. Accurate case boring can make all the difference in the world for long piston life. Horsepower is the name of the game at Bonneville and Dan prepares all of the heads that go on Aaron's engines, and has for several years. Dan has been porting heads for years, providing all of the head porting services for a well-known major shop, using his own CNC machine and other equipment. The experts at HAMMER PERFORMANCE have been boring and honing cylinders for years and have developed and refined a process that gives perfect results every time. Proper clearance gives better ring seal, longer life, and MORE POWER. Aaron also manufactures the CNC billet pieces you'll find on our web site, and developed the CNC programs we use for head porting. Our 4-Axis CNC process cut it's first head in 2003, and since then we've run literally thousands of head through it, producing powerful street and race bikes across the globe. Content w​as　c​reated  with GSA