Mandrel bent stainless steel construction; laser tig welds; machined internal welds.

Wide-band 02 bung provisions on both ends. Includes all necessary gaskets and fasteners.

Please note: We've found the fitment to be a little too tight on the additional wideband bungs for use on the automatic transmission. On MT cars it's fine, and those with ATs can still run these test pipes with those optional bungs capped off.