Exhaust› Headers, Manifolds and Components

Hedman Hedders

HEDMAN GM CAR HEADERS-SILVER

$665.54

SKU: H00V 68646

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 68646

Features:

  • Handcrafted, Mild Steel Construction.
  • The Mid-Length Tube Header Design Provides Significantly More Low and Mid-range Power than Cast Manifolds, and Provide Better Ground Clearance And Component Compatibility Than Long Tube Headers.
  • Ball & Socket Collector Design requires No Gasket, and Allows For More Exhaust System Misalignment than Old School, Gasket-Style Header Collectors
  • Includes All The Necessary Mounting Hardware, Gaskets and Reducers (exhaust adapters)
  • Limted Lifetime Warranty On Construction, Five Year Warranty on Factory-Applied Header Coating!
  • Proud To Say, Made In The USA, Since 1954!

HTC Coated Headers | 1-5/8 in. Tube Dia. | 3 in. Coll. | Mid-Length Design

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

Hedman Hedders has been manufacturing quality headers in the USA since 1954. These headers are designed to increase engine performance and efficiency. They are made from 16-gauge mild steel tubing with 1/4" thick flanges at the head and collector. This particular model features Hedman's HTC coating, a ceramic-metallic formula that protects against extreme temperatures and road elements.

**Fitment Notes / Requirements (from OPGI):**
* Without smog injection or injection heads
* Includes parts to retain emission devices (50 States)
* With A.I.R. system
* Modify stock exhaust to retain catalytic converter
* Shorty Header/Maximum Ground Clearance (Note: product is mid-length, but this note was present)
* Not recommended for use with aluminum heads
* 70-later AC equipped vehicles require bracket # 20110
* Must use non-shell motor mounts
* Not legal for sale or use in California on pollution controlled motor vehicles (CARB Note 45)
* Will fit angle plug heads (Chevy aluminum only)
* Must modify rotary AC bracket
* Clearance modification may be necessary on Gen VI big-block engines (502) (Note: product is for Small Block, but this note was present)
* Designed with additional clearance for use with close ratio steering box

**Transmission Compatibility:**
* Manual Transmission - Floor: Yes
* Automatic Transmission - Column: No
* Automatic Transmission - Floor: No
* Manual Transmission - Column: No

**Power Steering Compatibility:** Yes

Fitment

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Specifications

BrandHedman Hedders
Part NumberH00V 68646

Videos

1975 K5 blazer hedman hedders and flowmasters :)

1975 K5 blazer hedman hedders and flowmasters :)

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.

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