Size: ID 3-1/2 inch to OD 4 inch(inner size 3.5" to outer size 4" exhaust reducer). The exhaust adapter can be welded or clamp together. Pipe length 4 inch, pipe thickness 0.059", please allow tolerance 0.12"
One piece mold construction without welding that ensures its durablity. Manufactured with precision bends and OE-style routings,heavy duty 16-Gauge stainless exhaust coupler for longer life.
The exhaust reducer is made of T201 S/S nonmagnetic stainless steel, anti-corrosion and durable.