Headers for Firebirds 1970-1981
| Year | Engine | Brand | Part Number | Tube Size | Collector Size | Finish | PS | PB | AC | Trans |
| 1970-81 | 350-455
D-port |
Dynomax | 85114 | 1 5/8" | 3" | P | Y | Y | Y | M/A |
| 1977-81 | 403 Olds | Dynomax | 85030 | 1 3/4" | 3" | P | Y | Y | Y | M/A |
| 1977-81 | 403 Olds | Dynomax | 86030 | 1 3/4" | 3" | C | Y | Y | Y | M/A |
| 1970-79 | 350-455
D-port |
Flowtech | 11170 | 1 5/8" | 3" | P | Y | Y | Y | M/A
FS |
| 1977-79 | 350-403
Olds |
Flowtech | 11150 | 1 5/8" | 3" | P | Y | Y | Y | M/A
FS |
| 1970-79 | 350-455
D-port |
Flowtech | 94901 | 1 5/8" | 3" | P/C | Y | Y | Y | M/A
FS |
| 1977-79 | 350-403
Olds |
Flowtech | 93901 | 1 5/8" | 3" | P | Y | Y | Y | M/A
FS |
| 1970-81 | 326-455
D-port |
Hedman | 28150 | 1 3/4" | 3" | P | Y | Y | Y | M/A
FS |
| 1970-81 | 326-455
D-port |
Hedman | 28140 | 1 5/8" | 2,3" | P | Y | Y | Y | M/A
FS |
| 1970-81 | 326-455
O-Port |
Hustler | 35010 | 1 3/4" | 3" | P | N | Y | N | A |
| 1970-81 | 326-455
O-Port |
Hustler | 35130 | 1 3/4" | 3" | P | N | Y | N | A |
| 1970-81 | 326-455
O-Port |
Hustler | 35140 | 1 7/8" | 3 1/2" | P | N | Y | N | A |
| 1970-81 | 326-455
D-Port |
Hustler | 35145 | 1 7/8" | 3 1/2" | P | N | Y | N | A |
| 1970-81 | 326-455
O-Port |
Hustler | 35150 | 2" | 3 1/2" | P | N | Y | N | A |
| 1970-81 | 326-455
D-Port |
Hustler | 35160 | 2" | 3 1/2" | P | N | Y | N | A |
| 1970-74 | 250
Chevy |
Hooker | 2602 | 1 5/8" | 2 1/2" | P | N | Y | Y | M/A |
| 1970-74 | V6
Buick |
Hooker | 1113 | 1 1/2" | 2 1/2" | P | Y | Y | Y | M/A |
| 1978-81 | 301 | Hooker | 4111 | 1 5/8" | 2 1/2" | P | Y | Y | Y | M/A |
| 1970-81 | 326-455
D-port |
Hooker | 4109 | 1 3/4" | 3" | P | Y | Y | Y | M/A |
| 1977-79 | 350-403
Olds |
Hooker | 3107 | 1 3/4" | 3" | P | Y | Y | Y | M/A |
| 1970-81 | 400-455
O port |
Hooker | 4202 | 2" | 3 1/2" | P | Y | Y | Y | M/A |
| 1978-81 | SB Chevy | Hooker | 2136 | 1 5/8" | 3 " | P | Y | Y | Y | M/A |
| 1978-81 | SB Chevy | Hooker | 2117 | 1 3/4" | 3 " | P | Y | Y | Y | M/A |
| 1978-81 | SB Chevy rectangle | Hooker | 2239 | 1 7/8" | 3 " | P | Y | Y | Y | M/A |
| 1970-79 | 326-455
D-port |
Nunzi's | 5511 | 1 3/4" | 3" | P | Y | Y | Y | M/A |
| 1970-79 | 400-455
O-port |
Nunzi's | 5512 | 1 3/4" | 3" | P | Y | Y | Y | M/A |
| 1970-81 | 400-455
O-port |
Nunzi's | 5513 | 1 7/8" | 3 1/2" | P | Y | Y | Y | M/A |
| 1970-73 | 400-455
O-port |
Nunzi's | 5514 | 2" | 3 1/2" | P | Y | Y | Y | M/A |
| 1970-73 | 326-455
D-port |
Nunzi's | 5515 | 2" | 3 1/2" | P | Y | Y | Y | M/A |
| 1970-79 | 301 | Nunzi's | 5523 | 1 5/8" | 2 1/2" | P | Y | Y | Y | M/A |
| 1970-1981 | 400-455 O-Port | Ram Air Restoration | RM-4 | 2.2" | Steel or Ceramic | Y | Y | Y | M/A | |
| 1970-1981 | 326-455 | Ram Air Restoration | RM-2OS | 2.2" | Steel or Ceramic | Y | Y | Y | M/A |