DD9 Header Set, Small Block Chrysler


The DD9 header set fits 1966 and older Chrysler, Dodge, Plymouth A-Body Cars using Chrysler 318-360 small block V8 engines.

Sanderson DD9 left side on engine
DD9 Header Set, Small Block Chrysler $484.87$724.15

Sanderson DD9 left side on engine
DD9 Header Set, Small Block Chrysler

Sanderson Headers - No Gaskets

The DD9 header set fits small block Chrysler (318-360) V8 engines in 1966 and older Dodge, Chrysler, and Plymouth applications, such as the Dart Demon, Duster, Dart Barracuda, Challenger, and other Chrysler A-body and E-body chassis.

Please review the “DD7, DD8, and DD9 notes” information tab to learn more about this header set and some important notes regarding the installation.

For Automatic Transmission applications ONLY!

Includes all hardware necessary for installation.


Engine: Small Block Chrysler 318-360 LA V8
Primary Tube Diameter: 1½”
Collector Diameter: 2½”


  • 16-Gauge Primary and Collector Tube Thickness
  • 3/8″ Thick Flange
  • Patented Flange Design Requires NO Gaskets
  • Tightest Fitting Header Available Anywhere!
  • Made in the USA


  • Header Bolt Set
  • Collector Reducer Set


Our Ceramic Coating is recommended for every vehicle application and is the default finish selection choice above. To meet high standards of quality, We apply a multi-layer inside and outside aluminized ceramic coating in-house and then polish the coating to a high luster. This aerospace and military-grade technology adds excellent protection to your headers while offering the benefit of thermal control in your engine bay. It also improves cylinder scavenging of exhaust gases and increases the longevity of your header investment.

Additional information

Weight17 lbs
Dimensions23 × 12 × 9 in
Header Finish

Silver Ceramic Coated, Black Satin Ceramic Coated, Plain Steel (raw metal)


Sanderson DD9 dimension graphic

DD7, DD8 , and DD9

The Sanderson DD7, DD8, and DD9 header sets fit small block Chrysler 318-360 engines in a variety of A-Body and E-Body vehicle applications. We are providing some extra information to help determine the correct header for your application and additional notes related to these headers and the vehicles they are designed for.

  • First, these headers are only compatible with automatic transmission applications. They can work with some hydraulic clutch setups. However, we do not have a list of compatible kits.
  • These headers require that the engine does not use an oil filter adapter or uses an aftermarket configuration that relocates the filter or directs the filter down. The early A-body adapter that points the filter rearward, for example, is not compatible.
  • The passenger (right side) header is the same for all three sets. Therefore, the difference between the kits is in the driver side header. This is due to variations in steering gears, steering shaft, mounts, and other components.
  • Some vehicle applications use the obnoxious Chrysler steering shaft coupler body at the end of the column that is about the size of a small house (an exaggeration of course, but this component is ridiculously large). If your vehicle uses this coupler it may interfere with the header on some applications. We suggest replacing the obnoxious coupler body (generic image shown below) with a more efficiently-sized aftermarket unit.
    Chrysler Steering Coupler
  • Engine location is always important regarding header fit, no matter the engine or the vehicle. Be wary of those who claim that certain Chrysler/Dodge/Plymouth vehicles require a special “location-correcting” engine mount kit to align the driveline to a factory or improved spec. Using these kits can prevent the proper fit of your headers.
  • Chrysler Corporation sometimes installed a variety of steering gear styles on these vehicles. If there is a fit problem, it is usually related to power steering gears. There are “some” instances where the specified header for the application will simply not fit. Often, this is as simple as exchanging the driver side DD8 or DD9 header for the DD7. In rare cases, none of the standard Sanderson driver side headers will fit. A custom (modified) driver side header at substantial additional cost is the only solution for these vehicles.

The Header Sets

  • The Sanderson DD7 was originally designed to fit 1970-76 Plymouth Duster and 1970-74 Barracuda applications. However, this also includes 1970-74 Dodge Challenger, 1967-79 Plymouth Valiant, and 1967-1976 Dodge Dart.
  • The Sanderson DD8 was designed to fit 1967-69 Plymouth Barracuda, 1966-69 Dodge Dart**, 1967-69 Plymouth Valiant**, and similar applications.
  • The Sanderson DD9 was designed for 1966 and earlier applications, specifically the 1964-66 Plymouth Barracuda, 1960-66 Dodge Dart, 1960-66 Plymouth Valiant, and similar applications.

** You may have noticed these vehicle applications (the model years) overlap both the DD7 and DD8 header sets. We suggest using the DD8 on those vehicles with manual steering. On power steering applications, it is, unfortunately not a clear choice as to which header works best. PLEASE, carefully look at the images of the DD7 and DD8 headers to determine which is best suited for your vehicle. It is here where we often do not know which header is correct until it is test-fit on the vehicle. Be aware that there is a difference between the Dodge and Plymouth steering systems even though they are both A-body vehicles.

Installation Notes

  1. The Patented Leak-Free Design on Sanderson Headers provides the only leak-free flange design on the market … Do Not Attempt To Use Flange Gaskets! The raised flange on tube-style Sanderson Headers will buckle the gasket during tightening and actually cause a leak!  It is only OK to use a header gasket on the cast-series header sets (QP1000 and QP2000) Click here for the header installation procedure.
  2. Sanderson Headers are NOT emissions legal on pollution-controlled motor vehicles. It is the purchaser’s responsibility to verify local regulations for compliance.
  3. Wrapping your Sanderson Headers with ANY thermal tape voids your header warranty. The best thermal protection for your headers is our Aluminized Ceramic Coating which is available for every Sanderson Header. For additional information on why using header wraps is a problem, please read this tech article by Century Performance Center which addresses thermal coatings and header wraps.

Header Warranty

Sanderson Header WarrantyLimited 5-Year General Warranty

Sanderson Street Rod Headers strives to supply our customers with the highest quality parts and services available in the street rod industry. In keeping with this, we warrant and will repair or replace, at our option after an inspection in our facility, any of our products that are found by us to have failed due to defects in either material or workmanship.  This warranty is activated by the return of the Warranty Card enclosed with every pair of headers and is effective for FIVE YEARS * from the date of purchase as indicated on the original invoice.

This Warranty does not cover products that fail due to improper motor tuning, alteration, disassembly, or damage caused by racing, misuse, neglect, abuse, improper installation, and/or accident, or when used on applications for which they were not designed or approved. We are specifically not responsible for the costs of removal, installation, transportation, destruction of other components, inconvenience, loss of time, or other personal damages, or for any other associated costs including the application of aftermarket coatings applied by others. Sanderson Street Rod Headers shall not be liable for any and all consequential damages occasioned by the breach of any written or implied warranty pertaining to this sale in excess of the purchase price of the product(s) as found on the original invoice.


* Extremely compact header designs that locate the collector in close proximity to the exhaust ports are very sensitive to engine tuning. Improper air/fuel mix or timing of ignition and/or valvetrain can cause early failure due to excessive heat. For this reason,  part numbers CC2 and CC3 are offered with a two-year warranty period only. This includes header sets that utilize one of these headers as part of the set (part numbers CC4 and CC14 for example). The compact header side will hold a 2-year warranty. All other Warranty conditions apply.

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