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Mopar Performance A4 Aluminum Engine Blocks & Components


Mopar Performance
Mopar Performance A4 Aluminum Engine Blocks & Components

Product images may differ from actual product appearance.

The Mopar A4 engine is a 4-cylinder aluminum block racing engine that is based on half of a small block Mopar. This engine uses one small block Mopar V8 cylinder head, valves, rocker arms, valve cover, and header. The drag racing versions of this block have the small block Mopar bell-housing and can be used with a transmission. The Midget versions of the block have the bell-housing machined away to save weight since these racing engines are not used with a transmission.



All A4 Aluminum Blocks have the following features:
  • 4-Bolt Billet Steel Main Caps (All are Cross Bolted)
  • 2.25" Mains (Use Ford 302 Main Bearings)
  • Ductile Iron Cylinder Sleeves w/ 4.120" Rough Bore
  • Siamese Bore Casting

    These racing engines must be used with a dry sump oiling system, and the gear drive systems shown below.



  • 7 Products
    Head Studs

    312-P4876757AB
    A4/A8 Head Stud Kit
  • Fits A4/A8 Blocks w/ W9 Cylinder Heads
  • Fits Two Cylinder Heads
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  • $462.99
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    Gear Drives & Service Parts

    312-P5007853
    Replacement Cam Hub & Hardware
  • Fits All A4/A8/Aluminum "A" Blocks
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  • $254.99
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    312-P5153458
    Replacement Idler Set
  • Fits All A4/A8/Aluminum "A" Blocks
  • Includes Idler Shaft, Bearing, 2 Spacers, 3 Screws & Snap Ring
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  • $397.99
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    Head Studs

    312-P5153699
    A4 Head Stud Kit
  • Fits A4 Blocks w/ P9 Cylinder Heads
  • Fits One Cylinder Head
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  • $464.99
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    Camshaft Cores - Unground Lobe

    312-P5007468
    A4 Camshaft Core - UGL
  • Fits A4 Blocks w/ W9 or W9RP Cylinder Heads
  • Unground Lobes (Requires Custom Grind to Your Specifications)
  • 60mm Journals
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  • $411.99
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    312-P5153519
    A4 Camshaft Core - UGL
  • Fits A4 Blocks w/ P9 Cylinder Heads
  • Unground Lobes (Requires Custom Grind to Your Specifications)
  • 60mm Journals
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  • $484.99
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    Crankshafts

    312-P5007573
    Forged Crankshaft - Un-Machined
  • Forging 4340 Steel
  • Un-Machined - Machine to your Specifications
  • Approximate Stroke Range 3.000" to 3.250"
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  • $301.99
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    7 Products