Exterior Components› Body Panels and Components

Doug's Headers

HEADER FLANGE GASKET

$59.34

SKU: D019 HG9312

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

HEADER FLANGE GASKET

MIA's Description

The Doug's Headers HG9312 is a set of header flange gaskets designed for Chevy small block Gen I V8 engines. These gaskets feature a rectangular port style with dimensions of 1.750 inches in port height and 1.625 inches in port width. Constructed from a compressed fiber laminate material, they are sold as a pair. The application range spans various Chevrolet models from 1957 to 2002, compatible with engine sizes including 4.6L/283 up to 6.6L/400.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDoug's Headers
Part NumberD019 HG9312

Videos

Why Not to Put Exhaust Headers on Your Car

Why Not to Put Exhaust Headers on Your Car
Upgrading Your 350 SBC With Budget Headers That Actually Work

Upgrading Your 350 SBC With Budget Headers That Actually Work
Best Headers for Chevy 350 [Top 5 Reviews] - Exhaust Manifold Racing Header [2026]

Best Headers for Chevy 350 [Top 5 Reviews] - Exhaust Manifold Racing Header [2026]
Installing Headers without Gaskets WTF ??

Installing Headers without Gaskets WTF ??
Long Tube vs Short Tube Headers | The Technical Differences

Long Tube vs Short Tube Headers | The Technical Differences
Are Headers Worth It?

Are Headers Worth It?
Classic Chevy Ceramic Tri-Y Headers | Doug's Headers | 1967-1972 C10 Install

Classic Chevy Ceramic Tri-Y Headers | Doug's Headers | 1967-1972 C10 Install
Doug's Headers + 2.5" Flowmaster Exhaust INSTALL - 72 Chevelle

Doug's Headers + 2.5" Flowmaster Exhaust INSTALL - 72 Chevelle
Long Tube Headers for your Classic Muscle Car, What to Expect for Installation

Long Tube Headers for your Classic Muscle Car, What to Expect for Installation
Headers that Fit!

Headers that Fit!

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy