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Hedman Hedders 28140 Long Tube Exhaust Headers 1-5/8" to 2" Stepped Primary Tubes

(1964-1973 Pontiac GTO; 1967-1981 Pontiac Firebird; 1967-1974, 1977 Pontiac Grand Prix; 1973-1975 Pontiac Grand Am; 1964-1977 Pontiac LeMans + 2 more models)

Manufacturer

Picture for manufacturer Hedman Hedders

Part Number

28140
10 reviews
Sale Price

$353.90

In Stock (9)

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Product Details

Hedman Hedders has been manufacturing quality headers in the USA since 1954, bringing decades of expertise to their long-tube header designs for Pontiac V8 engines. The 28140 features CNC mandrel-bent mild steel primary tubes in a stepped configuration that transitions from 1-5/8 inch to 2 inches, optimizing exhaust flow for maximum horsepower and torque gains on 326-455 cubic inch Pontiac engines.

Key Features:

  • Stepped primary tubes: 1-5/8" to 2" diameter for improved exhaust scavenging
  • 3-inch ball and socket gasketless collector design allows for exhaust system misalignment tolerance
  • Hand-welded mild steel construction with 16-gauge tubing ensures consistent quality
  • Three-tube long-tube design maximizes top-end horsepower and torque
  • Compatible with factory air conditioning and power steering
  • Oval port flanges designed for stock profile cylinder heads
  • 2-1/2 inch reducer outlet size included

What's Included:

  • Pair of headers (left and right side)
  • Header flange gaskets
  • Header flange bolts
  • Collector bolts and 3-bolt exhaust adapters (reducers)
  • Complete mounting hardware

These headers ship uncoated with a temporary black paint that will burn off during initial operation (the coating is non-flammable and smoke will dissipate after a few minutes). Due to oil filter location on some Pontiac applications, an oil filter relocation kit may be required for proper header tube clearance. Hedman recommends Trans-Dapt #1120 or Hamburger's #3365 relocation kits. Backed by Hedman's Limited Lifetime Warranty against defects in materials and workmanship. Note: For automatic transmission applications only; not compatible with manual transmissions.

Products specifications

Fits

1964-1973 Pontiac GTO; 1967-1981 Pontiac Firebird; 1967-1974, 1977 Pontiac Grand Prix; 1973-1975 Pontiac Grand Am; 1964-1977 Pontiac LeMans; 1964-1970 Pontiac Tempest; 1975-1977 Pontiac Grand LeMans

Bolts/Studs Included

Yes

Collector Attachment

Ball and socket flange

Cylinder Head Port Shape

D-port

Flange Style

Standard

Flange Thickness (in)

1/4 in.

Header Finish

Painted

Header Material

Steel

Header Style

Full-length

Motor Mounts Included

No

Primary Tube Diameter (in)

1 5/8 - 2 in.

Primary Tube Gauge

18-gauge

Quantity

Sold as a pair.

Reducers Included

Yes

Transmission Mount Included

No

Tuned

No

Weld-Up

No

Y-Pipe Included

No

Finish

Uncoated

Header Fasteners Included

Yes

Header Port Shape

Oval Port

Collector Style

Ball and Socket Style (Gasketless)

Tube Length

LONG Tubes

With EGR

No

Power Steering

Yes

FLANGE Thickness

0.3125 In.

Tube Material Thickness

16g

with A.I.R. System

No

Crossover Pipe Included

NO

Catalytic Converter(s) Included

No

Prop 65

WARNING: Cancer. For more info visit www.P65Warnings.ca.gov

Air Conditioning

Yes

Material

Mild Steel

Mounting Hardware Included

Yes

Gasket Or Seal Included

Yes

Installation Hardware Included

Yes

Port Shape

Oval

Collector Diameter

3 in.

Collector Size

3 in.

Reducer Outlet Size

2-1/2 in.

Collector Bolts Included

Yes

Contents

headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware

Cylinder Head

Stock Profile Heads

Emissions Notes

EO# D167-27 (click here for covered vehicles in document on ARB.CA.GOV website)

Exhaust System Dia

2-1/2 in.

Finish Type

UNCOATED Mild Steel! Shipped with Temporary Paint.

Package Contents

Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware

Tube Design

Standard

Tube Style

Long Tubes

E.O. #

Yes

Header Construction

MILD STEEL- Standard-Duty

Installation Notes

Modification to reverse lockout (back drive) mechanism may be required.

Notes

64-81 Various Pontiac Cars 326-455

Title

HEDMAN HEDDERS STANDARD UNCOATED HEADERS; 1-5/8-2 IN. TUBE DIA.; 3 IN. COLL.; FULL LENGTH DESIGN

Tube Diameter

1-5/8 in. x 2 in.

Tube Size

1-5/8 in. x 2 in.

Variations

28146

Replacement Gasket

27600

Replacement Head Flange Gasket

27600

Fitment was very good. Looks good

good company compared to the parts geek who don't care about their customers,I highly recommend

i was very pleased with product i received and the price was great,and the fact that i could pay with paypal was really nice. thank you

Got my products in a timely manner and they were exactly what I ordered. Will be shopping with Autoplicity in the future

Great products and price and car fitment check

I surfed the web and these guys had the best prices for the products i was looking for! I would recommend these guys to all my friends

easy to order, least expensive for same item selling elsewhere for up to50 more, plus shipping. Great site will use again

Fast

Best price found quick shipping couldn't be easier will buy again.

Fast shipping , product just as described, and quality product.

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