The O2 Weld-In Bungs from HMF work specifically for our high-end exhaust systems These bungs are made from Stainless Steel and fit standard bosch O2 sensors.
12mm x 1.25 O2 Bung
12mm x 1.25 O2 Bung Cap
18mm - 12mm O2 Bung Adapter
18mm x 1.50 - O2 Bung
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