Kit to add 18mm x 1.5in. threaded bungs for O2 sensors and O2 tuning samplers.
Remove heat shields, install bung and tune; when completed, use included screw and copper washer to seal bung and then replace heat shield for unaltered finish.
No pump or sampling tube required and allows both cylinders to easily be monitored at the same time.
Bung installation kit includes one drill bit, two O2 sampler blocks, tubing, 25 Rivnuts, 25 screws and 25 copper washers.
Refill kit PART #3807-0398 that includes 25 each of bungs, plugs and copper washers, sold separately (see page 418 of the 2018 Parts Unlimited Tire & Service catalog).
Made in the U.S.A.