It’s a First–
an all-new three-valve cylinder head from Triple D Induction.

Barry Grant’s new aluminum three-valve cylinder heads are designed with two inlet valves of 1.4” diameter and a conventionally sized exhaust. At .500” of lift, the new three-valve arrangement produces a curtain area that is almost 40% greater than a 2.02” two-valve design. In addition, since the inlet valves are much smaller, the valve springs are also smaller and lighter. Lighter valve seat pressures allow the engine to rev higher and more reliably.(The bigger the valve, the greater the seat pressure and spring rate to control it.) Further, though the new three-valve heads demonstrate excellent cylinder filling with low-lift camshafts, on high performance and racing engines they will outperform conventional cylinder heads. Created for use on conventional small-block Chevy engines, Vortec-headed small blocks, and pre-’86 Chevy LT1 engines, this new cylinder head is ideally suited for use on street and custom rods; street/strip and muscle cars; drag, oval, and road race cars; as well trucks, boats and off-road vehicles.

The advantages of this patented, three-valve, retrofit cylinder head are:

• Increased curtain area not only provides better performance and drivability from mildlytuned engines, but also on engines with high performance and racing components the new “three-valve” outperforms conventional heads
  
  
• Provides exceptionally good cylinder filling with smaller valve openings
  
  
• Smaller valves require smaller and lighter valve springs; therefore lighter valve-seat pressures, less inertia, higher revs, and more power
  
  
• On mildly tuned applications, higher valve lifts are unnecessary as low valve-lift flow is dramatically improved
  
  
• Impressive power and drivability with less wear-and-tear on rockers and springs and valve gear
  
  
• Can be easily retrofitted to all Chevy small-block and Vortec engines