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DSS Forged -2cc Flat Top Pistons, Early Style 389, 3.75" Str

Forged Flat Top Pistons
-2cc Valve Pocket
4.080" or 4.100" Bore
1.710 CH
.980" Pins included
6.625" Rod Length
1/16", 1/16", 3/16" Rings Required
**Fits 1964-66 22 deg. Cylinder Heads Only**
Availability: Ships in 7-10 Business Days
Pricing: $648.95

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389 Early Style Pontiac DSS GSX Series Forged Piston 2618 Alloy (For use in 3.750" stroke x 6.625" rod) -5cc Flat Top with two large valve reliefs, 1.710" comp hgt, Includes .980" full floating pin with double True Arc pin locks, 1/16-1/16-3/16" ring groove, patented "X Groove" skirt design

72cc-10.73, 78cc-10.07, 85cc-9.41

**Fits 1964-66 22 deg. Cylinder Heads Only**

Leap into the world of high performance pistons with D.S.S. Racing's GSX Series. Great care has been taken to reduce the piston weight by adding CNC milling in non-critical areas, and even larger and deeper CNC valve reliefs allow more aggressive cylinder head and cam combinations.

All GSX Series pistons have the patented 'X Groove' skirt as a standard feature. The groundbreaking X-shaped groove sweeps excess fuel and foreign matter in the oil drainback holes on the downstroke and into the side relief on the upstroke. This sweeping effect keeps the debris from getting trapped between the piston skirt and the cylinder wall, where it would normally cause scoring damage. With exoct fuels, blowers, Turbos and NOS running at today's power levels, ultra rich mixtures are required and commonplace. The X Groove combats the damaging effects of these applications, improves ring seal, cylinder wall condition and piston skirt condition.

Patented 'X Groove" Skirt
Larger, Deeper CNC Valve Reliefs For more Aggressive Cylinder Head Cam Combinations
Additional CNC Milling For Weight Reduction In Non-Critical Areas
Available In Either 4032 Allow Or 2618 Alloy
Drilled,Forced Wrist Pin Oiling
Drilled Bottom Ring Land Intersecting Oil Groove Drain Backs
Blower, Turbo, NOS Ready
Larger, Deeper CNC Valve Reliefs
Fully CNC Profiled Exterior
Precision Honed Piston Pin Bores
Diamond Turned High-Strength Skirts
High Strength Piston Pins
Available Flat Top, Power Producing CNC Milled 'Max Quench', Reverse Dome and Dome
Forged And Machined In The USA


  • DSS-2-6102
  • DSS-2-6102
  • DSS Racing
  • Ships in 7-10 Business Days
  • New

Shipping Information

  • Item Requires Shipping
  • 16.0 lbs.

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