Replace your restrictive OEM cast O2 housing with JMF's free flowing custom tubular model. - Made completely from 304 stainless steel. - The flanges are CNC machined from 1/2" material and are surfaced after welding for a leak free seal. - The exhaust outlet measures in at 2.5" while the wastage dump is a large 1.75." - Each piece comes with new SS studs and nuts already installed. 90-99 4G63 DSM.
