NOTICE: Probe Industries, the maker of Probe Pistons is no longer in business. We do not have any more of their pistons left in stock. The information on this page is for those that may already own a set of these pistons, or that find them for sale elsewhere and need the specifications.
Probe 440 forged pistons for big block Mopar 440 stock stroke and 440 stroker engines are a modern high performance design. Advances in CNC machine capability and the utilization of a "clean sheet of paper" method of manufacturing design has allowed Probe to create a high performance and racing 440 forged piston line that is arguably a work of art. Probe's method of machining wrist pin bores provides the most accurate pin bore possible.
Probe Forged Mopar 440 Pistons also feature the latest design innovations in ring land technology. The top ring land features radial anti-detonation grooves. These grooves knock the peaks off shock waves within the cylinder, reducing the propensity to detonate. The second ring land features our pressure equalization channel, which is a shaped channel that works by equalizing the pressure seen between the top and second ring with the pressure in the combustion chamber. This feature enhances ring seal, improving power, engine life and fuel economy. The Mopar 440 and 496 stroker pistons listed below all incorporate the advanced Probe Industries technology.
Probe Industries SRS 440 Forged Pistons are designed for performance and race applications where a strong, lightweight forged piston is an advantage. These full-featured pistons are extremely popular for use in street, strip, muscle cars, hot rods, street rods and most racing combinations.
Probe Mopar big block 440 forged piston sets include 8 pistons, pins, pin fitting and spiro locks.
Probe Industries Mopar 440 Flat Top Pistons Standard Stroke
|Compression Ratio computed with .010 deck and .038 head gasket Pistons use 1/16", 1/16", 3/16" Ring Grooves, 3.75" is the stock 440 stroke length, std. bore is 4.320"||Compression Ratio with head chamber of: (weights and compression ratios are approximate)|
|Part Number||Bore Size||Crank Stroke||Rod Length||Comp Height||cc's||72cc||80cc||84cc||86cc||Wt.||Pin Dia.|
Probe Plymouth Chrysler Mopar Dodge 440 based 496 Stroker Flat Top Pistons
Probe Mopar 440 Dish Top Pistons Standard Stroke
|Part Number||Bore Size||Crank Stroke||Rod Length||Comp Height||cc's||72cc||80cc||84cc||86cc||Gram
Probe 440 Mopar Stroker Dish Top Pistons 4.15 in. Stroker 496 Pistons
In the past all pistons featured cam ground piston skirts to achieve the shape required to work in an engine. As with most things computer technology has provided us with the ability to improve upon this technique. Probe Industries Racing is the recipient the newest CNC technology available to achieve the most accurate piston skirt designs and finishes in the industry. Further a complete "rethink" of the tooling and fixtures have allowed Probe to eliminate the variations caused by multiple setups. This all adds up to a better performing, stronger 440 Mopar piston at a reasonable price.
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