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Small block Mopar Headers.
Small Block Step Headers 63-66 A-body
Item Details
Small Block Step Headers 63-66 A-body
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Small Block Step Headers 63-66 A-body
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63-66 A-body / Small Block Headers



Recommended for 320-575 horsepower

Early A-body headers by TTI are constructed of 16 gauge mild steel tubing, mandrel bent on sophisticated computer controlled bending machines for precise fit and uninterrupted exhaust flow.  The mandrel bending process maintains a constant inside diameter of the tube for a smoother finish with no restriction of flow and no crimping of the tubes.


Our popular "STEP" design headers provide low-end response and top-end horsepower gain.  When coupled with a TTI Exhaust System, these headers become even more efficient.

  • 1-5/8" O.D. primary tubes / steps up to 1-3/4" O.D. secondary tubes / merged into 3" collectors

  • 3/8" thick laser-cut header and collector flanges, contoured for a leak free fit

  • Above the steering center link design (under chassis) offers maximum header to ground clearance

  • Full length header design for proven power gains

  • One piece header tubes / No slip tubes

  • Header Sets Include:  1/16" Header & Collector Gaskets, Header Bolts (12pcs) and Reducers/Adapters for hook-up to your Exhaust System.

  • Fits Applications: 

    • 1963-1966 "A"- bodies

63-66 "A"-body Headers


(Click on number to open footnote)

Engine Size

318 / 340 / 360  A-engines

37,  39

Cylinder Head

OEM, Edelbrock Magnum or Performer RPM


Front Ends


Auto Trans Yes

1521,  53

Standard Trans Yes

15,  21,  53

Floor Shift Yes  
Column Shift No  
Push Button Yes  
Power Steering Yes  
Manual Steering Yes  
Air Conditioning Yes  
Starters Listed Starters only


Flywheel / Bellhousing 9" or 10.5"


Steering Linkage OEM only

12,  33

Clutch Linkage OEM only


Oil Filters 90° Angle Adapter or a Remote Mount


Oil Pans OEM or Milodon


Valve Covers OEM or Cast Aluminum  


Installation instructions

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K-member type
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63-66 A-body / Small Block Headers for OEM, Edelbrock Magnum 
or Performer RPM heads


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