LSXHR 103mm FAST Intake Manifold for LS3 Rectangular Port

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The LSXHR™ 103mm Intake Manifold for LS3 Rectangular Port Applications is the industry's first polymer tunnel ram-style intake manifold and is ideal for generating maximum power in boosted and naturally aspirated engines.

The LSXHR™ 103mm Intake Manifold for LS3 Rectangular Port Applications features:

  • Standard "tall" stacks are interchangeable with separately purchased "medium" and "short" stacks to find the most powerful combination
  • Polymer construction is lightweight and high strength to eliminate power-robbing heat soak commonly found in aluminum intake manifolds
  • Average 30 HP gain between 5,000 and 7,500 RPM over competitors' high ram intake manifolds
  • Rated for up to 45psi of continuous pressure
  • Compound fuel injector angle aims spray pattern for ideal atomization, resulting in maximum power production and superior drivability
  • Reversible top allows for forward- or firewall-facing throttle body installations
  • Two nitrous nozzle bosses per runner for clean and easy direct port system installations
  • 103mm Throttle body opening can be ported to 105mm