Stock size rings grooves and press fit piston pins.

Narrow piston rings for the ultimate in power.

Specifically designed for racing applications!

Probe PRS Forged Pistons are specifically designed for racing applications. Now available for the Chevrolet 350 and Ford 2300, Probe PRS pistons are designed to be the lightest pistons available anywhere. In addition to the ultralight weight Probe PRS forged pistons are designed to radically reduce drag and enhance ring seal to increase power.

The Probe Industries revolutionary "Monocoque" 2618 forging produces the first true ultralight piston designed specifically for Chevrolet 2 barrel oval track use. A piston designed for a 355 cubic inch engine with a 6.000 inch center to center connecting rods currently weighs a mere 362 grams. This incredibly low weight is achieved with NO INTERNAL MILLING!

Due to the exclusive "Monocoque" forging design the Probe PRS forged piston is also stronger than any piston in it's class. This Probe piston forging virtually eliminates "oil canning" the piston deck, allowing a thinner deck with superior strength.

Added to the unequalled piston acceleration gained with the ultralight design, is the "frictionless" piston technology. The Probe PRS forged piston comes fully equipped with .043 .043 3mm ring grooves, allowing the use of extremely low drag piston rings. The specially designed skirt substantially increases available power and reliability. Excellent ring seal is ensured with the standard lateral gas ports in the top ring. Dual forced pin oilers are standard. And overall reciprocating weight is further reduced by the use of a .927 x 2.250 wrist pin.

Forged of 2618 t-61 Aluminum alloy for the ultimate strength and fatigue resistance
Light weight "Monocoque" forging designs for quick revs and power
Lateral gas ports for the ultimate in ring seal
Narrow ring lands .043" top and second in most models
"Frictionless" skirt designs
Radial Anti Detonation Grooves reduce detonation by clipping pressure spikes
Pressure Equalization Channel enhances ring seal, making more power and increasing fuel economy
Lightweight 2.250 pins and double spiro locks for durability.

INCLUDES:
• Cast Steel Crankshaft
• Moly Rings
• Probe SRS Forged Pistons
• CL77 Bearings
• Probe CNC Beam Forged Rods

Ford 347 Flat Top -4.0cc - STREET FIGHTER Engine Kit, 3.400" Stroke

$944.99

Part Number: 10660-SF-F347 1.090" Compression Height 3.400" Stroke 5.400" Rod Length Probe SRS Pistons Cast Steel Crankshaft Machined Beam (Bushed) Rods Available Bore Sizes: 4.000", 4.030", 4.040"

Chevy 406 Flat Top -4.0cc - STREET FIGHTER Engine Kit, 3.750" Stroke

$950.99

Part Number: 12338-SF-C406 1.425" Compression Height 3.750" Stroke 5.700" Rod Length Probe SRS Pistons Cast Steel Crankshaft Machined Beam (Bushed) Rods Available Bore Sizes: 4.125", 4.155", 4.165"

Chevy 406 Flat Top -4.0cc - STREET FIGHTER Engine Kit, 3.750" Stroke

$977.99

Part Number: 12339-SF-C406 1.125" Compression Height 3.750" Stroke 6.000" Rod Length Probe SRS Pistons Cast Steel Crankshaft Machined Beam (Bushed) Rods Available Bore Sizes: 4.125", 4.155", 4.165"

Chevy 406 Reverse Dome -15.0cc - STREET FIGHTER Engine Kit, 3.750" Stroke

$956.99

Part Number: 12340-SF-C406 1.425" Compression Height 3.750" Stroke 5.700" Rod Length Probe SRS Pistons Cast Steel Crankshaft Machined Beam (Bushed) Rods Available Bore Sizes: 4.155", 4.165"

Chevy 406 Dome Top +11.5cc - STREET FIGHTER Engine Kit, 3.750" Stroke

$998.99

Part Number: 14108-SF-C406 1.125" Compression Height 3.750" Stroke 6.000" Rod Length Probe SRS Pistons Cast Steel Crankshaft Machined Beam (Bushed) Rods Available Bore Sizes: 4.155", 4.165"

INCLUDES:
• Forged Steel Crankshaft
• Probe SRS Forged Pistons
• Race Rings
• Probe Forged 4340 Rods
• CL77 Bearings

Ford 347 Flat Top -4.0cc - PRO STREET Engine Kit, 3.400" Stroke

$1437.99

Part Number: 10660-PS-F347 1.090" Compression Height 3.400" Stroke 5.400" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft H-Beam Rods  Available Bore Sizes: 4.000", 4.030", 4.040"

Ford 363 Dish Piston - PRO STREET Engine Kit, 3.400" Stroke Package Includes Dart 4.125 Sportsman Block

$3666.43

Part Number: MCA-363PS 1.175" Compression Height 3.400" Stroke 5.315" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft Lightweight I-Beam Rods Available Bore Sizes: 4.125", 4.155" King HP Main brgs King HP Rod brgs Mahle File Fit Rings

Ford 5.1L (2V) Dish Top -21.1cc - PRO STREET Engine Kit, 3.750" Stroke

$1906.99

Part Number: 14434-PS-2V 1.048" Compression Height 3.750" Stroke 6.000" Rod Length Probe SRS Pistons Forged Micro Alloy Steel Crankshaft H-Beam Rods Available Bore Sizes: 3.552", 3.572", 3.625"

Chevy LS 6.8L 415 CI Flat Top -3.0cc - PRO STREET Engine Kit, 4.125" Stroke

$1566.99

Part Number: 14893-PS-C421 1.043" Compression Height 4.125" Stroke 6.125" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft H-Beam Rods Available Bore Sizes: 4.000", 4.030"

Chevy LS 6.8L Reverse Dome -25.9cc - PRO STREET Engine Kit, 4.125" Stroke

$1765.99

Part Number: 14903-PS-C421 1.043" Compression Height 4.125" Stroke 6.125" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft H-Beam Rods Available Bore Sizes: 4.000", 4.030"

INCLUDES:
• Forged 4340 Crankshaft
• File-fit Rings
• Probe SRS Forged Pistons
• H-Bearings
• Probe Forged 4340 Rods
• Tool Steel Wrist Pins

Chevy 434 Reverse Dome -23.6cc - DOMINATOR Engine Kit, 4.000" Stroke

$1865.99

Part Number: 14895-DM-C434 1.000" Compression Height 4.000" Stroke 6.000" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft Lightweight I-Beam Rods Available Bore Sizes: 4.155", 4.165"

Chevy 434 Dome Top +7.5cc - DOMINATOR Engine Kit, 4.000" Stroke

$1865.99

Part Number: 14109-DM-C434 1.000" Compression Height 4.000" Stroke 6.000" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft Lightweight I-Beam Rods Available Bore Sizes: 4.155", 4.165"

Chevy LS 6.8L Flat Top -3.0cc - DOMINATOR Engine Kit, 4.125" Stroke

$1871.99

Part Number: 14893-DM-C421 1.043" Compression Height 4.125" Stroke 6.125" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft Lightweight I-Beam Rods Available Bore Sizes: 4.000", 4.030"

Chevy LS 6.8L Reverse Dome -25.9cc - DOMINATOR Engine Kit, 4.125" Stroke

$1871.99

Part Number: 14903-DM-C421 1.043" Compression Height 4.125" Stroke 6.125" Rod Length Probe SRS Pistons 4340 Forged Steel Crankshaft Lightweight I-Beam Rods Available Bore Sizes: 4.000", 4.030"

CNC MACHINED BEAM STEEL

These connecting rods are the hi-tech answer to hand polished connecting rods. A fully machined periphery provides a consistency of finish not possible with a hand finished beam. Built to withstand the brutal environments associated with virtually all high performance engines. Recommended for engines in bracket, oval track, and most street and strip applications.

H - BEAM STEEL

Probe H-Beam Steel Rods are precision forged of select 4340 aircraft quality steel, vacuum degassed to remove impurities. Probe rods are forged in two pieces to insure proper grain flow. All surfaces are then CNC machined into our track proven H-Beam design and shot-peened to relieve stress. We then install silicon bronze bushings for increased wear resistance and precision ground alignment sleeves in the rod cap to prevent cap walk under high horsepower loads.

LIGHTWIEGHT 4340

Manufactured for high horsepower applications where strength is mandatory but a significant reduction in weight is desired. Probe Lightweight Steel Connecting Rods are manufactured of 4340 Steel which provides the excellent strength to weight ratio and are about 50 grams lighter than most H-beams. The Lightweight features 7/16 ARP cap screws and are dowelled to eliminate cap walk.

ULTRALIGHT 4340

For use in very high rpm engines, two barrel oval track, and drag motors with no power adders. Designed to provide maximum performance with a minimum of rotating mass. Painstakingly manufactured from premium 2 piece 4340 steel forgings, which will insure proper grain flow for maximum strength. Then fully machined on the latest in CNC equipment to ensure dimensional accuracy. Lastly ARP 8740 rod bolts are installed through the dowelled rod caps.