All black highlighted HAMMER 1275 cylinders, big fin or small fin, receive the CNC machined fin edge treatment. The 1250 kit he chose uses 15 degree Thunderstorm style Sledge Hammer Pistons and the chambers in his heads have been machined to match, giving the ultimate in chamber efficiency and Kovoobrábění breathing. If you're going for the black highlighted look, there's no need to settle for the sanded fin edges found on some competing 1250 kits. Also notice the CNC highlighted fins in the above photo! These brackets are also available below. Carb support brackets are offered in chrome or black. These air cleaners are CNC machined in-house out of 6061-T6 billet aluminum. Our AIR HAMMER Billet Air Cleaners for 95-02 Buell models represent a nice improvement on the Pro-Series, featuring our exclusive billet aluminum backplate with integral radius ring and offset spacer. Air Hammer air cleaners for 91-06 Sportsters require a carb mounting bracket as the air cleaner does not provide this function. Note: The clocked style angles the air cleaner downward to match the frame tube and tank.

An AIR HAMMER Air Cleaner feeds his Mikuni carb through a HAMMER ported intake manifold as well, ensuring this monster never runs out of breath. Well, search no more, HAMMER PERFORMANCE has the answer! What's more, unlike the old Pro-Series, our air cleaners use a centered style bolt pattern on the carbon fiber cover, allowing you to choose from the many available insert plates. One of the great things about the 1275 kit is that it delivers more power over the entire rpm range, unlike a lot of mods that tend to rob from one area to give more somewhere else. As a result, this cylinder delivers superb ring seal in even the most highly stressed, demanding applications, enabling more power! How much more power? All Air Hammer Air Cleaners also feature large K&N cotton gauze filter elements that minimize restriction, resulting in more power! Big fin cylinders will also fit on 1986-2003 bikes. The iron liner material is also rock hard for a long, trouble free life, and the aluminum fins promote excellent heat dissipation.

The Working Area of the Liner Remains Thick to Promote a Straight, Round Bore that Doesn't Distort Under the Heat and Pressure of a Running Engine. HD introduced big fins in 2004 when the cylinder pressure in 1200's was raised dramatically. The working area of the cylinder remains at a full four inches outside diameter, maintaining the thick, strong cylinder wall. This extra strong liner material enables a thinner spigot, which in turn enables the bigger bore. A thick liner promotes a straight, round bore under the heat and stress of a running motor. The larger fins were part of a coordinated plan to improve the cooling of the motor to handle the additional heat, along with oil squirters under the pistons and MAP based ignition. The 1275 cylinder is based heavily on our legendary 1250 kit, with one key difference: the liner is made of special 120,000 psi tensile strength steel. What Makes HAMMER 1250 Kits the Best? The legendary HAMMER 1250 Kit is a bolt-on that can be installed in an afternoon without case boring and without removing your engine from the frame. HAMMER PERFORMANCE is proud to bring you our own line of high performance air cleaners for your Sportster!

S2 ham can cover or one of our replacement versions. First on the list is our innovative new cylinder design! Yes, there's a reason it sounds like that, this is a POTENT combination sure to light up the back tire or lift the front end at will. A Daytona Twin Tec Ignition and a Rich Products Thunderheader round out the combination. Ever since the factory discontinued the Pro-Series air cleaner, Buell riders have been searching for a suitable replacement. Any of the air cleaners in this section will mount up to any 1991-present Sportster, to either the factory CV40 carburetor or the factory EFI throttle body. They feature a specially designed radius ring that smooths and straightens the air flow for the maximum performance possible. These kits stand alone as the biggest XL engine kit available that can be installed in an afternoon without case boring and without removing your engine from the frame. CRUSH can easily support builds up to 110 horsepower. They'll actually fit back to 1988 except the support bracket we offer does not have the correct bolt hole sizes for 4-speed heads (note that 2007-up models do not require the support bracket, the factory support bracket works fine).

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