Merlin Sierra D3O® Boots Black Size:UK10/EU44/US11 One of the most common

One of the most common symptoms of a failing O2 sensor is a decrease in fuel efficiency

This along with the new FormFit finger stitching gives unbeaten grip and feel in both dry and wet conditions

Spot Beam Distance: 1250 Feet (380 Meters)

Note: The punch marks at the threads must be drilled 1mm deep prior to removal

Merlin Sierra D3O® Boots Black Size:UK10/EU44/US11 One of the most commonSierra is the first Merlin boot to feature the Vibram high grip, no slip sole. In a mid height fit, Leather construction. Sierra is lightweight, easy to wear, has great comfort levels and importantly high levels of durability. Further, Sierra features an innovative ratchet closure system for a micro adjustable precision fit and D3Os shock absorbing impact protection. Material Premium Nubuck Brushed Leather Upper Reinforced Scratch Rubber Panels Vibram