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Icon Forged -11cc Dish Pistons, 389, 3.75" Str., 4.120" Bore

UEM-IC-9946-STD-8
Pontiac Keith Black FHR (400/STD Bore or 389/.058" Over) 4.120" X 1.714" CH Forged Flat Top Pistons- 5/64 5/64 3/16 Rings, VP Volume -11cc *DUAL VP's for '66 & Earlier 389/421 22 Deg Heads & '67 & Later 14 Deg Heads*
Pricing: $739.95

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Description

These Icon pistons feature a diamond-machined skirt, head, mini-grooves, pin bore, gas accumulator, ring grooves, and pressure-drilled pin hole oiling. They have a V-rib design for light weight, strength, and maximum piston cooling.

Icon Line of Forged Pontiac Pistons by Keith Black use a high quality forging that results in a much lighter piston than the Federal Mogul/TRW. The pin is also quite a bit lighter than the TRW. These pistons come with pin locks so they can be used with BUSHED or PRESS-FIT rods.

Image may not represent actual product.

*STOCK CAST RODS MAY NEED TO BE NARROWED AND BALANCE PAD REMOVED TO CLEAR INSIDE PISTONS

Specifications/Information

Specifications
Stock Bore: 4.150 Rod Length: 6.630 Pin Diameter: 0.9805
Stroke: 3.750 Comp. Ht: 1.714 Top Land: 0.307
Minimum Clearance   OE Deck Height: 10.250 Weight Piston/Pin: 540/149
Head Type D-cup Effective Head Volume 15cc
Ext. Valve Depth 0.220 Ext. Valve Dia. 1.960
Int. Relief Depth 0.221 Int. Relief Dia. 2.310

Compression Ratios

71-11.0

87-9.5

96-8.9

Pin Number

.980x3.000

Lock Ring

PRH107-3

Notes

Centered pin.  UseOE or Edelbrock style heads.  Some stock rods may need to be narrowed and balance pad removed.

Details

  • UEM-IC-9946-STD-8
  • UEM-IC-9946-STD-8
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Shipping Information

  • Item Requires Shipping
  • 16.0 lbs.

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