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For Milwaukee-Eight® Models

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  1. As low as: $899.00

    D&D’s newest Bob Cat pipe design increases power with improved tone while enhancing the Harley® boom. D&D's wrapped Big Bore baffle produces the signature sound of the pipe (plenty of bark!) and increases performance. Upswept 2:1 Bob Cat pipe includes chrome or black headpipes and is offered with an Aluminum, Black or Carbon sleeved muffler. The Bob Cat system increases ground clearance on lowered bikes but may not clear saddlebags. Fits models with "ribbed" oil tanks such as Rocker® and 2009 CVO Springer® models. These pipes are equipped with both 12 and 18mm oxygen sensor bungs. In compliance with ARB emissions laws, this product is not sold or shipped to California.
  2. Be the first to review this product

    As low as: $1,799.00

    The 4-valve M8 cylinder head flows considerably more air than previous 2-valve heads – but it needs to, to support today's larger engines. Flow testing the stock heads shows an imbalance between intake and exhaust flow ratios. Our combination of qualifying seat installation, CNC porting, professional seat and guide finishing with oversize valves, careful spring set up and decking ensures you will extract maximum power from your engine modifications while improving the flow imbalance. This work is performed on your supplied head cores. In compliance with ARB emissions laws, this product is not sold or shipped to California.
  3. Be the first to review this product

    From: $374.95

    To: $1,124.85

    Turn your 107" M8 engine into a 117" by simply boring your stock cylinders! No case modifications necessary, the factory 107" can be safely bored from 3.937" to 4.125". These forged pistons are manufactured for us by CP-Carrillo in 3 different compression ratios (flat top compression ratio is 11.2:1 with an unmodified 87.5cc head) and feature 1.5mm compression rings with 3mm oil rings for superior oil control. Piston kits include pistons, rings, wrist pins and circlips. USA made!

    In compliance with ARB emissions laws, this product is not sold or shipped to California.

  4. Be the first to review this product

    From: $989.95

    To: $8,237.90

    Our Muscle 117" Kit for the M-8 platform creates phenomenal power in a bolt-on top end and cam kit! We precision-bore and hone your cylinders to accept our +6cc domed pistons and then CNC-port your heads for increased flow and minimize intake to exhaust port differential. Oversize valves and performance valve springs are installed on carefully machined heads that are key to making this big M-8 power. We offer this kit with 2 cam choices, both of which deliver excellent power curves that are sure to satisfy any aggressive rider. The High Torque kit includes a Red Shift 548 cam - this is what we call the "rowdy" choice. The 548 creates tire-shredding power from just about any part-throttle RPM. Great for rowdy riders wanting instant power that are channeling their hooligan spirit animal! The High Power kit (Red Shift 552) builds power with an extra-strong mid-range and top end pull. This is the one for power junkies who regularly run in higher RPM ranges and want max available power. Both cams have a very lopey sound & feel–no hiding that this is a not stock engine! These kits include gaskets, tappet cuffs and a set of Quickee pushrods with covers to simplify reassembly. An EFI tuner, performance exhaust, oversize throttle body, injectors-intake will be required to achieve results shown

    In compliance with ARB emissions laws, this product is not sold or shipped to California.

  5. Be the first to review this product

    $989.95
    ThunderMax® is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride! In compliance with ARB emissions laws, this product is not sold or shipped to California.
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