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Auto Tec Pistons: Forged Pistons
Manufactured out of 4032 high silicone aluminum alloy forgings. This material is extremely durable, has great wear resistance, a low expansion rate, and very low friction. Skirts and rig grooves are CNC diamond turned. Wrist pins, pin fitting, wire locks, broached pin oilers, and accumulator grooves are included at no extra charge. Excellent for street or strip applications. Sets of 8.
4032 low expansion, high silicone forgings
Diamond turned skirts
CNC precision machined righ grooves
Top ring groove distribution grooves to enchance performance & improve ring seal
Broached pin oilers
Part Type: Pistons
Model: AutoTec 4032 Forged Pistons
Application: Chevrolet Big Block V8 489
Piston Style: Small Dome Top
Cylinder Bore: 4.280”
Compression Distance: 1.270”
Crankshaft Stroke/Rod Length: 4.250" with 6.385" Connecting Rod (489ci)
Deck Height (Zero Deck): N/A
Dome Volume: 22.7cc
Compression Ratio: 4.250" Stroke w/112cc Heads: 11.1
Compression Ratio: 4.250" Stroke w/118cc Heads: 10.5
Compression Ratio: 4.250" Stroke w/124cc Heads: 10.0
Piston Material: Forged 4032 Aluminum Alloy
Intake Valve Relief Depth: N/A
Intake Valve Relief Diameter: N/A
Exhaust Valve Relief Depth: N/A
Exhaust Valve Relief Diameter: N/A
Accumulator Groves: Yes
Forced Pin Oilers: Yes, Broached
Gas Ports: No
Skirt Coating: CNC Diamond Turned Skirts
Lock Removal Indents: No
Average Piston Weight: 567g
Wrist Pin Style: Press-Fit or Floating
Wrist Pins Included: Yes
Wrist Pin Size: 0.990"
Average Wrist Pin Weight: 141g
Pin Lock Included: Wire Lock
Ring Grove Sizes: 1.5mm, 1.5mm, 3.0mm
Piston Rings Included: No
Manufacturer: RaceTec Pistons
Manufacturer's Part Number: 1000289
Weight: 15.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Sets of 8
Note: Oil rail supports included.
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