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Slant 6
Hemi 6

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6 cylinder

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Big Block
6 cylinder

225 Impulse Race Heads

Produces up to 80hp more and costs 30% less than typical race heads

Impulse race heads are fully rebuilt cast-iron heads which are modified with our advanced air flow technology to produce 30% more torque and horsepower per dollar than ported aluminium heads or rebuilt cast-iron heads offered by other businesses.

225 Impulse Race Head Specs and Features

  • Open Chamber
  • 9:1 Compression Ratio
  • High Flow Intake and Exhaust Ports
  • Unshrouded Intake and Exhaust Valves
  • Hardened Exhaust Seats
  • Special 4 Angle Valve Job
  • Special Pocket Porting
  • HD Valve Springs (up to .550" lift)
  • Valve Spring Retainers (chromemoly)
  • Positive Valve Stem Seals (all rubber 2 ring type)
  • Valve Stem Collets (hardened with reduced shoulders)
  • K-Line Valve Guides
  • Height of Valve Guides reduced to allow .550" lift
  • Hi-Tensile Manifold Studs and Nuts
  • New Brass Frost Plugs
  • Cleaned and Crack Tested
225 Valves
  • 1.78" Flat Head Intake
  • 1.37" Tulip Head Exhaust

Impulse Engine Technology P/L

PO Box 986 Randwick NSW 2031 Australia
Ph: (02) 9398 5544
Fax: (02) 9398 5644

International: Ph: +(612) 9398 5544
Fax: +(612) 9398 5644

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Inventor of Negative Pressure Supercharging

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