Tegiwa Stainless O2 Weld-On Bung E-AS but you still had to

but you still had to deal with the tedious and time-consuming task of block and girdle notching

Designed using leading-edge Solidworks 3D CAD & Cosmos FEA software

The COBB 3" Downpipe is one of the key upgrades for the MAZDASPEED3 to unlock a huge amount of torque hidden away within the MZR 2

and the supplied tube nut and tube sleeve are slid onto the hard lines

is the best

Tegiwa Stainless O2 Weld-On Bung E-AS but you still had toTegiwa Stainless O2 Weld On Bung Made from stainless steel, this boss is ideal if you need to run an extra sensor or even if you are building a custom exhaust system. We also sell the bung to fit this thread