- Home
- Redline Emissions Products
- M12 X 1.25

DPF Parts Direct.com has the largest Redline Emissions Products® inventory in North America.
Redline Emissions Products® is an all-makes line of aftertreatment emissions parts that are available through a network of dealers and select online retailers.
DES (parent company for DPF Parts Direct.com) is a Master Dealer for REP. Redline Emissions Products® offers one of the most comprehensive parts coverage in the industry, with over 100 SKUs for DPFs / DOCs, over 45 clamps, over 110 gaskets, over 100 sensors, over 45 weld bungs, and over 30 charge air coolers & accessories.
Redline Emissions Products® DPFs feature our Born on Weight™ on the ID tag, which helps cleaning shops know the exact target weight of a cleaned unit. All REP parts are OEM quality fit, with professional top-tier packaging and single item packaging that helps protect during shipping and for inventory. Shipping warehouses are on west and east coast of U.S., making ground shipping fast and affordable.
Redline Emissions Products (14)

Redline Emission Products Popular Bung Assortment (REP BK4522)
$675.00
Due to overwhelming request, we have developed a popular weld bung replacement kit. The part number for the kit is REP BK4522. This kit includes (3) each of our top 15 moving, most popular weld bungs. Kit Contents: (3) BG1029, (3) BG1027, (3) BG2003, (3) BG1005, (3) BG2019, (3) BG2006, (3) BG1001, (3) BG1002, (3) BG2012, (3) BG2015, (3) BG1010, ...

Redline Emissions Products Weld Bung (BG1005) - M12 X 1.25, 1" OD, 7/8" H, Normal Flare
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG1005): 12mm x 1.25 (THREAD DIA & PITCH) 1" OD (Outside DIA) 7/8" H (Height) Fitting w/ Normal Flare Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment. This Weld Bung and ma...

Redline Emissions Products Weld Bung (BG2018) - M12 X 1.25, 0.79" OD, 0.61" H, Flat Flare Stepped. Replaces DETROIT 23539605
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG2018): 12mm X 1.25 (THREAD DIA & PITCH) 0.785"OD (Outside DIA) 0.610"H (Height) This fitting has a (STEPPED) FLAT FLARE Replaces OEM: DETROIT 23539605 sensor boss How to replace Detroit Sensor Boss Instead of buying a new DPF you can now simply replace the bung. These bungs allow...
Redline Emissions Products Weld Bung (BG2012) - M12 X 1.25, 1" OD, .709" H, Flat Flare Stepped

Redline Emissions Products Weld Bung (BG2012) - M12 X 1.25, 1" OD, .709" H, Flat Flare Stepped
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG2012): 12mm x 1.25 (THREAD DIA & PITCH) 1" OD (Outside DIA) 0.709" H (Height) Stepped Fitting with Flat Flare Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment. This Weld Bung...

Redline Emissions Products Weld Bung BG1010 - M12 X 1.25, 3/4" OD, 1" H, Flat Flare
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG1010): 12mm X 1.25 (THREAD DIA & PITCH) 3/4" OD (Outside DIA) 1" H (Height) Fitting with Flat Flare. For a similar bung but with a step and normal flare look at the BG2010. The BG2010 and the BG1010 have the same dimensions. Instead of buying a new DPF you can now simply replace ...
Redline Emissions Products Weld Bung (BG2010) - M12 X 1.25, 1.1" OD, 13/16" H, Normal Flare Stepped

Redline Emissions Products Weld Bung (BG2010) - M12 X 1.25, 1.1" OD, 13/16" H, Normal Flare Stepped
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG2010): 12mm x 1.25 (THREAD DIA & PITCH) 1.1" OD (Outside DIA) 13/16" H (Height) Stepped Fitting with Normal Flare Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment.
Redline Emissions Products Weld Bung (BG2003) - M12 X 1.25, 1" OD, 7/8" H, Normal Flare Stepped

Redline Emissions Products Weld Bung (BG2003) - M12 X 1.25, 1" OD, 7/8" H, Normal Flare Stepped
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG2003): 12mm x 1.25 (THREAD DIA & PITCH) 1" OD (Outside DIA) 7/8" H (Height) Fitting Normal Flare Stepped Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment. This Weld Bung and...

Redline Emissions Products NOx / O2 Adapter Weld Bung (BG1026) - M12 X 1.25 & M18 X 1.50, 7/8" OD, 3/8" H
$22.50
REP Oxygen Sensor Bung Hex Insert (BG1026): 12mm x 1.25 (inside) 18mm x 1.50 (outside) 7/8" OD (Outside DIA) 3/8" H (Height) Fitting Adapter & Hex Insert Stainless Steel Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment.

Redline Emissions Products NOx / O2 Weld Bung (BG1017) - M12 X 1.25, 1" OD, 5/16" H, Stepped
$22.50
Redline Emissions Products OEM Replacement Oxygen Sensor Stepped Weld Bung (BG1017): 12mm x 1.25 (THREAD DIA & PITCH) 1" OD (Outside DIA) 5/16" H (Height) Fitting Stepped Stainless Steel Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper f...

Redline Emissions Products Weld Bung (BG1008) - M12 X 1.25, 3/4" OD, 1" H, Rev Flare
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG1008): 12mm x 1.25 (THREAD DIA & PITCH) 3/4" OD (Outside DIA) 1" H (Height) Fitting w/ Reversed Flare Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment.
Redline Emissions Products Weld Bung (BG2009) - M12 X 1.25, 1" OD, .846" H, Normal Flare Stepped

Redline Emissions Products Weld Bung (BG2009) - M12 X 1.25, 1" OD, .846" H, Normal Flare Stepped
$22.50
Redline Emissions Products OEM Replacement Weld Bung (BG2009): 12mm x 1.25 (THREAD DIA & PITCH) 1" OD (Outside DIA) 0.846" H (Height) Stepped Fitting with Standard Tapered Flare Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment.

Redline Emissions Products NOx / O2 Weld Bung (BG1018) - M12 X 1.25, 1" OD, 1/2" H
$22.50
Redline Emissions Products OEM Replacement Oxygen Sensor Weld Bung (BG1018): 12mm x 1.25 (THREAD DIA & PITCH) 1" OD (Outside DIA) 1/2" H (Height) Fitting Stepped Stainless Steel Instead of buying a new DPF you can now simply replace the bung. These bungs allow you to position your sensor where it needs to be, ensuring proper fitment.