PRODUCT DETAILS

Standard Uncoated Hedders; 1-5/8 Tube Dia.; 3 Coll.; FULL LENGTH Design

Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Headers for Chevy Corvettes for decades. 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 your Small Block Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors.

These LONG-TUBE headers fit 1984-1991 Chevy Corvettes powered by a SB Chevy (Gen 1) engine. The smooth 1-5/8 in tube design provides ample exhaust flow to let your Vette's 283-400 SB Chevy engine breathe easy, and produce maximum horsepower and torque. These headers are uncoated, and ship from the factory with a temporary black paint that will burn off when submitted to normal operating temperatures. For protection against the element and lower underhood temperatures, these headers are also available with a silver or black ceramic-metallic finish.

Each set includes a pair of gaskets, header flange bolts and collector bolts. No collector gasket is needed. Hedman Hedders is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty.

SPECIFICATIONS

☑ TUBE DIAMETER: 1-5/8
☑ TUBE STYLE: Long Tube
☑ COLLECTOR STYLE: Ball and Socket Style (Gasketless)
☑ AIR CONDITIONING: Yes
☑ AUTOMATIC TRANSMISSION - COLUMN: No
☑ AUTOMATIC TRANSMISSION - FLOOR: Yes
☑ MANUAL TRANSMISSION - COLUMN: No
☑ MANUAL TRANSMISSION - FLOOR: Yes
☑ COLLECTOR ATTACHMENT: 3
☑ COLLECTOR SIZE: 3
☑ CONTENTS: Header(s), new bolts and gasket(s) to head, reducer(s) and hardware, instructions
☑ E.O. #: No
☑ EMISSIONS NOTES: NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only.
☑ EXHAUST SYSTEM DIA: 2-1/2
☑ FINISH: Uncoated
☑ FLANGE STYLE: Standard
☑ FLANGE THICKNESS: 0.25
☑ HEADER PORT SHAPE: Round
☑ HEADER STYLE: Long Tube
☑ KEY FEATURE: Non-EGR
☑ NOTES: 84-91 Chevrolet Corvette 283-400
☑ PORT SHAPE: Round
☑ POWER STEERING: Yes
☑ MATERIAL: Mild Steel
☑ TUBE DESIGN: LONG TUBES
☑ TUBE LENGTH: Long Tubes
☑ TUBE MATERIAL THICKNESS: 18g
☑ TUBE SIZE: 1-5/8
☑ VARIATIONS: 68446, 68448
☑ WITH A.I.R. SYSTEM: No
☑ WITH EGR: No
☑ WELD-UP: No
☑ REDUCER OUTLET SIZE: 2-1/2
☑ TUNED: No
☑ BOLTS/STUDS INCLUDED: Yes
☑ CATALYTIC CONVERTER(S) INCLUDED: No
☑ COLLECTOR BOLTS INCLUDED: Yes
☑ CROSSOVER PIPE INCLUDED: No
☑ GASKET OR SEAL INCLUDED: Yes
☑ INSTALLATION HARDWARE INCLUDED: Yes
☑ MOTOR MOUNTS (INCLUDED): No
☑ MOUNTING HARDWARE INCLUDED: Yes
☑ REDUCERS INCLUDED: Yes
☑ TRANSMISSION MOUNT/CROSSMEMBER (INCLUDED): No
☑ Y-PIPE INCLUDED: No
☑ QUANTITY: Sold as a pair.
☑ PRIMARY TUBE GAUGE: 18g
☑ PRIMARY TUBE DIAMETER (IN): 1.625
☑ PACKAGE CONTENTS: Header(s), new bolts and gasket(s) to head, reducer(s) and hardware, instructions
☑ HEADER MATERIAL: Mild Steel
☑ HEADER FINISH: Uncoated
☑ CYLINDER HEAD PORT SHAPE: Round
☑ CYLINDER HEAD: Stock Profile Heads
☑ HEADER CONSTRUCTION: Standard-Duty
☑ REPLACEMENT GASKET: 27500
☑ REPLACEMENT HEAD FLANGE GASKET: 27500