Group 145 group_header Part No. | CH-109 | E-36 3 series detail 318iS | Ti & TS detail 4cyl Twin Cam detail Try-Y design | Prim. Pipe | Sec. Pipe | Outlet | Manual | Auto | Oxy Sensor detail Mandrel Bent detail 1 5/8 | 1 3/4 | Flanged | Yes | Yes | N/A detail � Replacement for factory headers. Bolts to original 4 bolt flange detail � Only suit twin-cam engine detail Ceramic coating optional extra. Enquire for price