Private label MFG test pipe are made of 304 TIG welded stainless steel. It has an integrated slip-fit design that is adjustable in length and rotational to adapt to almost any combination of header length and collector flange position.
*o2 bung w/ plug included for use with o2 sensor.
The piping of this testpipe is a OD (OUT DIAMETER) of 2.5
The flange of the piping will be at a 2.5 ID (INNER DIAMETER) 3 bolt flange (EXHAUST SIDE), but will bolt up to a 2.5 exhaust.