PRO GUIDE
& S High-Flow Indian Challenger Air Filter
The last few years of King of the Baggers racing has certainly proven that S & S Cycle knows how to make the Indian Challenger fast - " and we ' ve been looking forward to a supporting line of performance parts for the street going version of this machine ," says Marketing Director Jon Montgomery .
Feuling M-8 Rocker Shafts
These new rocker shafts from Oceanside , California based Feuling Parts are available for M-8 and Twin Cam engines , and designed " with strength in mind ," says CEO Luke Leatherman . " After having a rocker shaft failure when road racing our 2019 Harley-Davidson Road Glide at Laguna Seca , in 2020 we decided to source the best possible material and heat-treat process available to create the best rocker shaft on the market . " With over double the strength of the factory rocker shafts , and of any of our competitors ' shafts , we precision-grind them from 4140HT steel - gas nitrated and final surface treated for greatest possible quality finish and durability . " Custom tooling was created for M-8 engines to provide a countersink relief for the bolt / nut head verses , machining away the entire end of the shaft per the factory design ." Feuling recommends these shafts for all M-8 and Twin Cam engines and especially for engines
2BDL ' s high-strength SG-4 ring gear is a " must-have if you ' re running a big horsepower 2007-current power plant without compression releases and with one of BDL ' s chain or belt drive baskets ." These ultra strong gears are heat-treated to the precise Rockwell hardness standard that is called for when used in these high-impact applications ."
The first hint of what ' s to come is a high-performance air filter with a claimed 20 % gain in flow over the factory unit , featuring its proven washable filter media " which means it will outlast ten of the stock air filters ." It fits all 2020 through 2022 Indian Challengers .
S & S CYCLE INC . Viola , Wisconsin , USA Tel : 608 627 1497 sscust @ sscycle . com www . sscycle . com
running higher lift camshafts and heavier valve spring pressures . Twin Cam Rocker Shafts are also available .
FEULING PARTS Oceanside , California , USA Tel : 619 917 6222 info @ feulingparts . com www . feulingparts . com
High-Strength Ring Gear
The BDL ring gear is a direct " heat & shrink " fit to the BDL basket and provides far superior strength and longevity to the OEM ring gear . " Remember - for starting , battery voltage and ignition timing or MAP are critical for any size engine ."
BELT DRIVES LTD Brea , California , USA Tel : 714 693 1313 info @ beltdrives . com www . beltdrives . com
34 AFTERMARKET MOTO DESIGN - JANUARY 2022 www . AMDchampionship . com