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1-3/4" headpipe steps up to 1-7/8" into the collector to increase flow and improve performance
Accordion panels on elbows help movement and comfort on the bike
Buckle closure system incorporates polymer and fiberglass buckle arms and high-impact aluminum bridge closures for durability and weight saving
Two-piece clamp-on design
the direct fusion of the outer shell material with the waterproof membrane effectively stops the water right at the outside layer of the garment
ALPINESTARS Chrome Shoes - Waterproof - Black/White - US 12.5 2543123-157-125 Big Power Filter Kit 1-3/4" headpipe steps up toLightweight upper combining full grain leather and suede Side zip opening Advanced rubber compound cup sole with MX derived heel shape Waterproof Drystar membrane Perfect for urban riders looking for a comfortable, casual, and stylish show that'll go perfectly with their favorite pair of riding jeans Has dual density ankle protectors and the Alpinestars TPF Transversal Protection Frame, plus, an internal toe box and heel counter support layered under