NIB TTI Headers (1-5/8" x 1-3/4" x 3" Step Headers)

Fits: 1962-78 B-body, 1970-74 E-body, 1976-80 F-body, 1977-88 M-body, Polished Ceramic Coated with a Thermal Barrier

Small Block > 1-5/8" x 1-3/4" x 3" Step Headers > 1-5/8" x 1-3/4" x 3" Step Headers

From the link. Please verify.