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  Home > Pistons > Probe Forged Pistons > SRS - Sportsman Race Series > Ford > Ford - 302 Windsor > Flat Top >

Probe Forged Pistons_SRS Series_Ford 331_Flat_1.165 C/H_4.000 Base Bore_-4.0cc_.912 Pin_Twisted Wedge 11R Head
Probe Forged Pistons

Photo may not be actual product


Available Part Numbers/Oversize

8100-1-75261-000 - 4.000
8100-1-75261-030 - 4.030
8100-1-75261-040 - 4.040

Probe Industries Sportsman Race Series (SRS) Forged Pistons are designed for high performance street and all racing applications. They are available in a wide variety of designs, tuned to achieve the highest performance possible. Any combination from high performance street to mild nitrous or boost to race only cars will find Probe SRS Series Forged Pistons to be the perfect piston for virtually any application.
  • 2618-t6 Forged Aluminum
  • Lightweight wrist pins
  • Lightweight piston designs
  • Full floating wrist pins
  • Tight running clearances
  • Low Friction Narrow piston rings
  • Broached Pin Oilers
  • Low drag skirt design
  • Large variety of compression ratios
  • Design specific valve reliefs
  • Nitrous - to 250 H/P
  • Forced Induction - 12 lbs
  • Four (each) minimum order quantity
Custom sizes and applications are also available. Additional cost and manufacture times may apply.
Allow approximately 14 business days for manufacture. Delivery times may vary seasonally.

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Item# Item Name Price Qty Add
8100-1-75261-000 SRS Pistons_Ford 327_Flat_4.000 Bore_-4.0cc
8100-1-75261-030 SRS Pistons_Ford 331_Flat_4.030 Bore_-4.0cc
8100-1-75261-040 SRS Pistons_Ford 333_Flat_4.040 Bore_-4.0cc
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Technical Specs:
Item Code8100-1-75261
VendorProbe Industries
Product TypePistons
Product ModelSportsman Race Series - SRS
Nitrous250 H/P
Forced Induction12 lbs
Engine Displacement331
Engine FamilyFord - 302 Windsor
Base Bore4.000
Rod Length5.400
Compression Height1.165
Top TypeFlat
Net Piston Volume-4.0
Minimum Deck Thickness.180
Valve Pocket LocationTwisted Wedge 11R
Valve Pocket Cutters2.200 Intake - 1.700 Exhaust
Valve Pocket Depth.200 Intake - .150 Exhaust
Wrist Pin Type5115 Carbon Steel
Wrist Pin Diameter.912
Wrist Pin Length2.500
Wall Thickness.150
Wrist Pin Weight116 grams
Pin OilersForced
Pin Lock TypeDouble Spiral
Oil Support RailYes
Rings IncludedNo
Ring Grooves1.5 - 1.5 - 3.0
Gas PortsNo
Gas Port SizeN/A
Ring Lands.260 - .180 - .080
QuantitySold in sets of 8
Minimum Order Quantity4 (each)

Compression Ratio:
Cylinder Head Volume
Part Number Net cc 58cc 61cc 64cc 72cc
8100-1-75261-000 -4.0 10.23 9.86 9.52 8.73
8100-1-75261-030 -4.0 10.36 9.99 9.65 8.85
8100-1-75261-040 -4.0 10.41 10.03 9.69 8.89
Computed with .010 deck and .040 x 4.060 gasket

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Pistons > Probe Forged Pistons > SRS - Sportsman Race Series > Ford > Ford - 302 Windsor > Flat Top > Twisted Wedge 11R Head