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.
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. These headers have a high temperature, POLISHED-SILVER ceramic finish that resists corrosion, and can withstand temperatures up to 1400 degree F. This finish is covered by a 5 year factory warranty, in addition to Hedman's standard lifetime header warranty.
Specifications:
| Description_DEF |
[B@68229b5c |
| Description_DES |
[B@1a6931ea |
| Description_EXT |
[B@2bb93c98 |
| Description_FAB |
[B@11dc4f20 |
| Description_FAB |
[B@6d58ce3c |
| Description_FAB |
[B@3eed441c |
| Description_FAB |
[B@5c52e2a5 |
| Description_FAB |
[B@2f041340 |
| Description_FAB |
[B@48611b2 |
| Description_INV |
[B@501f689a |
| Description_MKT |
[B@1b13fff6 |
| Description_SHO |
[B@148261c7 |
| Title |
HEDMAN HEDDERS HTC COATED HEADERS; 1-5/8 IN. TUBE DIA.; 3 IN. COLL.; FULL LENGTH DESIGN |
| Air Conditioning |
Yes |
| Automatic Transmission - Column |
No |
| Automatic Transmission - Floor |
Yes |
| Manual Transmission - Column |
No |
| Manual Transmission - Floor |
Yes |
| Tube Material Thickness |
16g |
| Material |
Mild Steel |
| Tube Design |
Standard |
| Tube Length |
Long Tubes |
| Tube Diameter |
1-5/8 in. |
| Reducers Included |
Yes |
| with EGR |
No |
| Weld-Up |
No |
| Tuned |
No |
| Bolts/Studs Included |
Yes |
| Catalytic Converter(s) Included |
No |
| Collector Bolts Included |
Yes |
| 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 |
| Y-Pipe Included |
No |
| Variations |
68440, 68448 |
| 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 |
27500 |
| Replacement Head Flange Gasket |
27500 |
| California Proposition 65 |
WARNING: Cancer & Reproductive Harm. For more info visit www.P65Warnings.ca.gov |
| with A.I.R. System |
No |
| Tube Size |
1-5/8 in. |
| Tube Style |
Long Tubes |
| Flange Thickness |
0.3125 in. |
| Exhaust System Dia |
2-1/2 in. |
| Reducer Outlet Size |
2-1/2 in. |
| Collector Attachment |
3 in. |
| Collector Diameter |
3 in. |
| Collector Size |
3 in. |
| Notes |
84-91 Chevrolet Corvette 283-400 |
| Collector Style |
BALL and SOCKET Style (Gasketless) |
| 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 |
| Header Style |
Long Tube |
| E.O. # |
No |
| Key Feature |
Non-EGR |
| Emissions Notes |
Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only. |
| Header Port Shape |
Round |
| Port Shape |
Round |
| Flange Style |
Standard |
| Power Steering |
Yes |
This Part Fits:
| Year |
Make |
Model |
Submodel |
Engine |
| 1988 |
Chevrolet |
Corvette |
35th Anniversary Edition Hatchback 2-Door |
5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated |
| 1989-1991 |
Chevrolet |
Corvette |
Base Convertible 2-Door |
5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated |
| 1989-1991 |
Chevrolet |
Corvette |
Base Hatchback 2-Door |
5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated |
