Catalog Section # Part name Qty Prod Prod date FINIS Part No. Ford Sierra MkI (1982-1986) F4.11 - Exhaust System With Catalyst (TL20EFI, CAT) 6 Muffler assy - centerUSE WITH RETROFIT PACK ONLY 1 D 8/82 - 12/86 6167236 86BB 5230 DC Ford Sierra MkI (1982-1986) F4.11 - Exhaust System With Catalyst (TL20EFI, CAT) Engine: TL20EFI 1 8/82 - 12/86 6167236 86BB 5230 DC Ford Sierra MkI (1982-1986) F5.10 - Catalyst Installation Kits (TL20EFI CAT, TL16E, TL18) 4A Engine: TL18, TL20H, TL20EFI 1 D 8/82 - 12/86 6167236 86BB 5230 DC