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Butler Performance Inc. - Doug's ROUND-PORT Headers
Identifying headers can be an issue. Here is info to help get the correct headers for your application. The d-port head looks like a set of "D"'s mirroring each other, in other words back to back. The round port actually looks like a sideways "D" that is pointing upwards. This is not a "D-Port" head but a round port instead. Doug's Round Port Headers fit both cast iron Round-Port and Edelbrock Round-Ports heads.
Browse Doug's ROUND-PORT Headers Products
Items 1-9 of 9
Description: Pontiac 1967-1969 326-455 Firebird Round Port Headers 1 7/8" Pipe 3 1/2" Collector (Ceramic Coated)
Item #: DHE-D568
Condition:
New
Price: $1,019.95
Description: Pontiac 1967-1969 326-455 Firebird Round Port Headers 1 7/8" Pipe, 3 1/2" Collector (Black)
Item #: DHE-D568-B
Condition:
New
Price: $879.95
Description: Pontiac 1970-1981 326-455 Firebird Round Port Headers for EDL Heads 1 7/8" Tube, 3 1/2" Collector Black Painted
Item #: DHE-D581-B
Condition:
New
Price: $889.95
Description: Pontiac 1970-1981 326-455 Firebird Round Port Headers for EDL Heads 1 7/8" Pipe 3 1/2" Collector (Ceramic Coated)
Item #: DHE-D581
Condition:
New
Price: $1,039.95
Description: Pontiac 1964-1972 326-455 GTO, Lemans Round Port Headers 1 7/8" Pipe, 3 1/2" Collector (Black) *Man. Trans. Cars Must Use 1964-65 Z-Bar/GM# 9776376 APE-R166K* *May have to reposition brake proportioning valve on dr. side frame rail*
Item #: DHE-D567-B
Condition:
New
Price: $879.95
Description: Pontiac 1964-1972 326-455 GTO, Lemans Round Port Headers 1 7/8" Pipe, 3 1/2" Collector (Ceramic Coated) **Man. Trans. Cars Must Use 1964-65 Z-Bar/GM# 9776376 APE-R166K* *May have to reposition...More Details »
Item #: DHE-D567
Condition:
New
Price: $1,039.95
Description: Doug's Headers D523 2" 4-Tube Full Length Header Pontiac Firebird 400-455 70-74 Metallic Ceramic Coating
Item #: DHE-D523
Condition:
New
Price: $1,129.95
Description: Doug's Headers D522 2" 4-Tube Full Length Header Pontiac GTO 400-455 68-72 Metallic Ceramic Coating
Item #: DHE-D522
Condition:
New
Price: $1,119.95
Description: Doug's Headers D522-R 2" 4-Tube Full Length Header Pontiac GTO 400-455 68-72 Black
Item #: DHE-D522B
Condition:
New
Price: $879.95
Items 1-9 of 9