SuperTrapp : New products from the Cleveland , Ohio based disc-tuneable exhaust manufacturer include a new fitment for Harley ' s Pan America ADV . Using 22 pre-installed 5 " discs " for a deep , low tone rumble " it ships with an S-bend connector tube and all the necessary hardware to bolt it straight onto the stock headers . The complete slip-on muffler kit is around 2.5 kg lighter as the stock exhaust and includes an approved spark arrestor . The SuperTrapp tuneable disc system allows you to adjust , or " fine-tune ," the sound level , powerband and performance . The discs also provide a scavenging effect - the gap between each disc ranges from . 023 inch ( 0.584 mm ) wide on the inside of the muffler to . 028 inch ( 0.711 mm ) on the external open edge . As hot exhaust gases pass through the discs to exit the muffler , they enter a larger area , creating a slight pressure drop as the gas expands , creating a scavenging effect for the hot gas still inside the muffler . Adding discs increases the size of the exhaust outlet , increases exhaust flow and exhaust tone while reducing backpressure . More discs move the power band up to give more top-end power and lean out the fuel mixture . Removing discs decreases the size of the exhaust outlet , decreases exhaust tone and exhaust flow while backpressure is increased . Fewer discs tend to increase low-end torque and make the fuel mixture richer ; www . supertrapp . com
Bagger Nation : Phoenix ' brightest son , Paul Yaffe , continues to be one of the most prolific new parts designers in the market . Recent additions include his ' FIX-Stand ', updated Fire Bolt COB taillights , Mini Monkey engine guard , ' Swoop ' stretched custom rear end kits and rear end kits with integrated billet skid plate and an update to his popular ' Sharknando ' custom performance bagger kit ; www . baggernation . com
S & S Cycle : With 18 months under his belt as president at the Viola , Wisconsin home of ' Proven Performance ', ex-Harley man Paul Skarie says he ' s no stranger to the status and pedigree of S & S in the market . " This is a company with an unparalleled pedigree in the performance aftermarket and it is exciting to have the chance to lead it ." On his watch , S & S engineers have completed 18 months of R & D and have this month introduced the longawaited 129 " and 132 " Big Bore kits for M-8 engines - look for a full interview with Paul in the next edition of AMD ; www . sscycle . com
Arlen Ness : Recent news from the legendary Dublin , California parts and accessory designer and manufacturer is of a collaboration with internationally respected designer and former World Championship custom bike builder Winston Yeh of Rough Crafts fame . The company ' s partnership with Winston was first announced a couple of years ago , but following the sell-out of limited run initial inventory , the past months have seen Ness " go deep " to meet demand . Products include Rough Crafts ' design finned / retro M-8 cam cover and rocker box designs and patented Ness tech- equipped air cleaner options . Air cleaner features include Ness award-winning hidden breather system and oil catch reservoir to eliminates oil blow-bye issues on M-8 engines . O-ringed at the heads , their hidden breather passes through the backing plate and exits inside the mouth of the throttle body through proprietary shooter tubes . This eliminates the need for any external hoses or hardware for a virtually closed loop system . Specially designed breather bolts are hidden under billet covers for a clean look ; www . arlenness . com
www . AMDchampionship . com
Custom Cycle Inc : Now owned and operated by Ron Linville , the iconic Oceanside , California business ( home to Randy Smith ' s famed finned engine covers ) is still the ' go-to ' for front fork tubes . Recent additions include radial brake caliper brackets for 43 mm fork tubes and ' Mad Dog ' FLH and FXR powertrain mounting systems for reduced vibrations and reduced lateral and torsional powertrain movement ; www . customcycleengineering . com
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