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Ed Rinke Performance

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The LS Family Production & C5R Aluminum Heads

The LS Family Production & C5R Aluminum Heads

Great cylinder-head airflow has been a key enabler of the LS-Series’ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads – from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from General Motors’ extensive research and development program, ensuring maximum airflow without compromises. In fact, many professional builders use our heads as straight bolt-ons, with no further machining. Many of our assembled heads use premium machining and materials, including CNC finishing and porting, along with lightweight, hollow-stem valves, sodium-filled exhaust valves and – on some heads – lightweight titanium intake valves.

Aluminum LS Family Head Technical Notes:

  • Manufactured from 319-T5 aluminum alloy
  • High-efficiency combustion chambers
  • Symmetrical intake and exhaust ports
  • Angled spark plugs (14mm; 5/8" hex; 3/4" reach; taper-seat plugs)
  • 15° valve angle (except C5R and LS7)
  • Bolt-down-type rocker arms (except C5R)
  • Center-bolt valve cover hold-downs
  • Fits Gen III and Gen IV Small-Blocks only*