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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 ring grooves
Top ring groove distribution grooves to enhance performance & improve ring seal
Broached pin oilers
Part Type: Pistons
Model: AutoTec 4032 Forged Pistons
Application: Pontiac Big Block V8 406
Piston Style: Flat Top
Cylinder Bore: 4.150”
Compression Distance: 1.700”
Crankshaft Stroke/Rod Length: 3.750" with 6.625" Connecting Rod (406ci)
Deck Height (Zero Deck): N/A
Dome Volume: -5.0cc
Compression Ratio: 3.750" Stroke w/71cc Heads: 10.8
Compression Ratio: 3.750" Stroke w/78cc Heads: 9.9
Compression Ratio: 3.750" Stroke w/88cc Heads: 9.3
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: 566g
Wrist Pin Style: Press-Fit or Floating
Wrist Pins Included: Yes
Wrist Pin Size: 0.980"
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: 1000785
Weight: 15.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Sets of 8
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