BBJD Hemi Unlimited Super Stock Head

State of the art billet aluminum cylinder head for tractor pulling.

High Performance

Years of research has produced very high airflow combined with impressive wet flow for improved horsepower that shows up on the track.

Extreme Durability

Tired of valve train problems? Sophisticated valve train modeling and advanced geometry are two of the reasons why we have over 20 heads in use with no valve train issues.

Complete Package

The Head Package includes assembled cylinder head with top quality components (springs, retainers, titanium valves, etc.). In addition, we include rocker arms, head studs, head gasket, billet aluminum exhaust flanges, two piece billet valve cover, and ARP fasteners.

BBJD Hemi CylinderHead Package

This cylinder head design is based upon the proven V-8 hemi head design. This revolutionary hemi-style billet cylinder head flows almost 100 cfm more than our industry leading SBJD cylinder heads we offer.. Each billet head is CNC machined from a solid piece of aircraft grade aluminum for the ultimate in reliability, incredible airflow and the lowest possible weight.


This head package will put you in the winners circle!

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Specifications

Summary:

  • Airflow: over 640 cfm
  • Weight: 145 lbs
  • Down Nozzles: two per cylinder
  • Material: Billet (solid block) of Aircraft grade Aluminum
  • Oiling system: built in to the valve cover

Full Specifications:

Port design by Dave Bamber – best airflow in tractor head to date at over 640 cfm.  High airflow combined with wet flow testing and design has produced very impressive performance!  Customers will be impressed with the performance over a wide rpm range and a wide range of fuel mixtures.

Designed for maximum reliability, and light weight.  The aluminum alloy and heat treat have been carefully selected for maximum heat transfer, strength, and crack resistance.  In addition, the design has been optimized to eliminate hot spots which eventually lead to soft spots and/or cracking.

Two fuel down nozzle connections are provided in the head for each cylinder.  The location and orientation were carefully selected to optimize wet flow.  Most intake manifolds are built with additional nozzle ports in each intake runner for additional fuel circuits.

The oiling system built into the two piece billet valve cover is simply connected by an o-ringed connection when the valve cover is bolted down!  No need to disconnect / re-connect oil lines.  In addition, the perimeter of the valve cover is sealed with an o-ring rather than a gasket.  Similarly, the intake flanges are sealed to the cylinder head with o-rings.

Package Contents

The Head Package includes assembled cylinder head with top quality components (springs, retainers, titanium valves, etc.). The kit includes:

  • head studs (stand deck height block)
  • head gasket (annealed copper)
  • billet rocker arms (with adjusters)
  • billet rocker arm stands
  • exhaust gaskets (annealed copper)
  • billet valve cover / oiling system
  • high quality ARP fasteners

Options

Optional Upgrades available:

  • Tool Steel Camshaft - grind optimized for head flow
  • Roller lifters
  • Billet Aluminum intake manifold
  • Stainless steel exhaust header with 2000F coating
  • Polishing available for any/all: valve cover, intake manifold, exhaust header
  • Fire rings installed

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