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  • Complete kit to add 18mm x 1.5in. threaded bungs for O sensors and O 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
  • No welding
  • Bung installation kit includes one hydraulic insertion tool, one drill bit, two O sampler blocks, tubing, 25 Rivnuts, 25 screws and 25 copper washers, all contained in plastic case
  • Refill kit PART #3807-0378 includes 25 each of bungs, plugs and copper washers, sold separately
  • Made in the U.S.A.