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4.6 Noonan Hemi Small Block

Maximum HP with the weight break of a small block engine!

The 4.6 small block Noonan Hemi is a scaled down version of the record breaking 4.9 Noonan Hemi engine. But do not let it’s size fool you – this combination has been 3.51 in a RvW car! It is a great choice for serious racers who want Hemi power, but with the added weight break of a small block engine.

Available upon special request, please contact us to obtain a custom quote for you racing program.

This 4.6 Noonan Hemi Small Block Engine includes, but not limited to the following machining/blueprinting:

  • Balancing
  • CNC Block Machining
  • Block receiver groove
  • Top fuel hoop heads
  • Cylinders double torque plate diamond honed for correct piston to wall clearance and surface finish
  • Full surface finish report on deck, head and cylinder wall finish
  • Engine fully blueprinted
  • Heads CC’d and valve job
  • Valve spring heights set up
  • Pushrod length
  • Rocker geometry
  • Engine Break-in and heads re-torqued

Short Block Components:

  • Noonan 4.6 BS Hemi small block
  • Clevite V Series Main Bearings
  • Clevite V Series Rod Bearings
  • 70mm Roller Cam Bearings
  • Callies, Winberg or Bryant Racing Billet Crankshaft
    MGP, GRP, or R&R Billet Aluminum Rods
  • Custom ROSS Racing Pistons

Long Block Components:

  • Noonan Promod Hemi 4.6 cylinder heads
  • Noonan valve covers
  • ARP 5/8″ Head Studs
  • Titanium Exhaust valves
  • Titanium Intake valves
  • Clarke Copper Cylinder Head Gaskets
  • Custom camshaft 70mm
  • JHE/PSI Valve Spring
  • Custom Tool Steel Manton push rods
  • RCD Gear Drive with auxiliary drive
  • Jesel 1.062 Keyway lifters
  • Manton Billet Rocker Arms
  • Barnes Systems Oil pump
  • Custom oil pan
  • Noonan Billet Intake Manifold & Fuel Rails


 – ACE Racing Engines makes no guarantee regarding operation of the Goods in settings or in ways that may be illegal or highly regulated, including those regarding smog and emissions. Please refer to your State/Country guidelines. 

 – Due to the custom nature of our builds, the product images shown here are for illustration purposes only and may not be an exact representation of the product.