Speed Pro pistons: Cast Hyperuetectic Pistons Sealed Power / Speed Pro pistons, is the premier brand of replacement engine parts for automotive, performance and a wide range of other applications. Sealed Power replacement pistons are manufactured from exclusive aluminum alloys matched to the engines’ performance requirements. Proprietary casting, machining techniques and quality control procedures ensure unsurpassed reliability and service
Optimized metallurgy allows operation with standard ring end gaps and conventional ring land locations
Speed Pro pistons are Highly resistant to scuffing
Speed Pro pistons are the Ideal choice for street performance applications
Most Feature DUROSHIELD® anti-friction skirt coating
Speed Pro Pistons DUROSHIELD® skirt coating dramatically reduces friction and related scuffing without the need to adjust wall clearance. The result is enhanced ring seal, increased horsepower and extended piston life.
Speed-Pro’s hypereutectic pistons operate perfectly with standard ring end gaps and have conventional ring land locations. When compared to traditional cast pistons, which are not designed for performance use, the hypereutectics are significantly stronger, particularly in the highly loaded ring land, skirt and pin bore areas. Speed-Pro’s FM244 Alloy contains 16.5 percent silicon and has excellent tensile and fatigue strength. This material’s improved thermal characteristics, its greater hardness and the increased resistance to scuffing permit tight bore clearances which help minimize noise on cold engine start up. This quiet operation, along with a lower cost are the primary advantages over a comparable forged piston. These pistons are an excellent choice for street performance, “claimer” oval track engines and bracket racing use. Speed Pro pistons will also work well in moderate supercharged applications and are suitable for towing and marine use
Piston to Valve and Cylinder Head ClearancesPiston to valve clearance should be a minimum of .100". This clearance will be changed if heads or block have been machined and must be checked at asse...
Choosing the correct compression ratio for an application is the key to success. Too high a ratio will cause far more problems than will one that is a bit low, so b...
350 BASED eng. +.020 over sized (4.000 bore x 3.480 Stroke) Float or press pin, coated skirt. Pistons sold in sets of 8, price shown is each Do not use in a 4.3L
350 BASED eng. +.030 over sized (4.000 bore x 3.480 Stroke) Float or press pin, coated skirt. Pistons sold in sets of 8, price shown is each Do not use in a 4.3L
350 BASED eng. +.040 over sized (4.000 bore x 3.480 Stroke) Float or press pin, coated skirt. Pistons sold in sets of 8, price shown is each Do not use in a 4.3L
350 BASED eng. +.060 over sized (4.000 bore x 3.480 Stroke) Float or press pin, coated skirt. Pistons sold in sets of 8, price shown is each Do not use in a 4.3L
454 BASED; .100 Dome w/ 1 valve relief, 4.250 bore x 4.00 stroke, press or floating pin, coated skirts. Pistons sold in sets of 8, price shown is each.
383 Stroker Based eng. .200 Dome (4.000 bore x 3.750 Stroke) press or float pin, coated skirt. 350 engines using a 400 SBC crank with 5.7" rods. Pistons sold in sets of 8, price shown is each.
454 BASED; .210 Dome; 2 valve reliefs, 4.250 bore x 4.00 stroke, press or floating pin, 6.135" rods, coated skirts. Pistons sold in sets of 8, price shown is each.
383 Stroker Based eng. Flat 2 reliefs(4.000 bore x 3.750 Stroke) press or float pin, coated skirt
350 engines using a 400 SBC crank with 5.7" rods. Pistons sold in sets of 8, price shown is each.
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