Hedman Hedders has been manufacturing quality headers in the USA since 1954, and classic musclecars is their specialty. Each set uses mild steel, smooth flowing, CNC mandrel bent tubes, that are hand-welded to ensure each pair is identical to the next. Hedman's unique, gasketless ball and socket collector design allows you to bolt up, even if it is not perfectly aligned with the header collectors.

Hedman Hedders is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty.

Features

HTC Coated Headers
1-5/8 In. Tube Dia.
3 In. Coll.
Full Length Design

Application

1976-1980 Chevrolet Camaro Base CID 305 Naturally Aspirated GAS
1967-1969 Chevrolet Camaro Base CID 327 Naturally Aspirated GAS
1969-1980 Chevrolet Camaro Base CID 350 Naturally Aspirated GAS
1981 Chevrolet Camaro Berlinetta CID 305 Naturally Aspirated GAS
1981 Chevrolet Camaro Berlinetta CID 350 Naturally Aspirated GAS
1968 Chevrolet Chevy II Nova CID 327 Naturally Aspirated GAS
1968 Chevrolet Chevy II Nova CID 350 Naturally Aspirated GAS
1976-1979 Chevrolet Nova Base CID 305 Naturally Aspirated GAS
1969-1979 Chevrolet Nova Base CID 350 Naturally Aspirated GAS

Specs

Manufacturer Specs:

TUBE DIAMETER	1-5/8 in.
TUBE STYLE	Long Tubes
AIR CONDITIONING	Dependent on Vehicle (refer to VEHICLE APPLICATION Footnotes)
AUTOMATIC TRANSMISSION - COLUMN	Yes
AUTOMATIC TRANSMISSION - FLOOR	Yes
MANUAL TRANSMISSION - COLUMN	No
MANUAL TRANSMISSION - FLOOR	Yes
POWER STEERING	Yes
COLLECTOR ATTACHMENT	3 in.
COLLECTOR DIAMETER	3 in.
COLLECTOR SIZE	3 in.
COLLECTOR STYLE	BALL and SOCKET Style (Gasketless)
REDUCER OUTLET SIZE	2-1/2 in.
EXHAUST SYSTEM DIA	2-1/2 in.
CONTENTS	Header(s), new bolts, gasket(s) to head, reducer(s) and hardware, instructions
FINISH	HTC Polished Silver Ceramic-Metallic
FINISH TYPE	HTC SILVER (polished) Ceramic-metallic Coating
FLANGE STYLE	Standard
FLANGE THICKNESS	0.3125 in.
HEADER STYLE	Long Tube
NOTES	67-81 Camaro, 68-79 Nova 283-400
MATERIAL	Mild Steel
TUBE DESIGN	Standard
TUBE LENGTH	Long Tubes
TUBE MATERIAL THICKNESS	16g
TUBE SIZE	1-5/8 in.
WITH AIR SYSTEM	No
WITH EGR	No
EO	Yes
EO #	EO# D167-33
WELD-UP	No
TUNED	No
BOLTS/STUDS INCLUDED	Yes
CATALYTIC CONVERTERS INCLUDED	No
CROSSOVER PIPE INCLUDED	No
GASKET OR SEAL INCLUDED	Yes
HEADER FASTENERS INCLUDED	Yes
INSTALLATION HARDWARE INCLUDED	Yes
MOTOR MOUNTS INCLUDED	No
MOUNTING HARDWARE INCLUDED	Yes
REDUCERS INCLUDED	Yes
Y-PIPE INCLUDED	No
QUANTITY	Sold as a pair.
PRIMARY TUBE GAUGE	16g
PRIMARY TUBE DIAMETER IN	1.625 in.
PACKAGE CONTENTS	Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware
HEADER MATERIAL	Mild Steel
HEADER FINISH	HTC Polished Silver Ceramic-Metallic
CYLINDER HEAD PORT SHAPE	Round
CYLINDER HEAD	Stock Profile Heads
HEADER CONSTRUCTION	MILD STEEL- Standard-Duty
REPLACEMENT GASKET	41827500
REPLACEMENT HEAD FLANGE GASKET	41827500
HEADER PORT SHAPE	Round Port
PORT SHAPE	Round
COLLECTOR BOLTS INCLUDED	Yes
AIR CONDITIONING NOTES	50 State (No A.I.R.)
FOOTNOTES	NO AC equipped Gen 1 Camaro or Gen 2 Nova; 70-Up with A/C require bracket 20110.

Guides & Documents

Headers Installation Instructions (41866277)

CA Prop 65

CARB warning

Hedman Hedders 66277 Specifications

D-167-33

KEY SPECS
MFG. Part #	66277
Brand	Hedman Hedders
Header Tube Type	Long Tube
Exhaust Port Shape	Round
Flange Style	Standard
Primary Tube Diameter	1-5/8"
Material Type	Mild Steel
Color	Silver
Weld-Up	No
Collector Diameter	3 Inch
Finish	Polished
Hardware Included	Yes
Gasket(s) Included	Yes
Collector Reducers Included	Yes
Collector Reducer Exit Diameter	2.5"
CARB EO#

GENERAL
Sold in Quantity	Set
Collector Length	3"
Flange Thickness	0.3125"
Tuned	No
Crossover Pipe Included	No
Primary Tube Gauge	16-gauge
CARB EO Number	EO# D167-33

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