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Wiseco Pistons Wiseco Pistons - Geo/GM
Includes: moly coated skirts, rings, wrist pins & circlips.
* Non-coated, not supplied with rings.

Wiseco is world renown for their work building race winning pistons for compact engines featuring small bores, multi-valves, and high RPM's applications for many years.
Features:
  1. Valve Pocket designs that allow max flow around valve, also allowing oversized valves and high lift cams to be utilized.
  2. Piston crown shapes designed to promote max Intake Charge efficiency thru scavenging mixture 'Cross Flow" during intake and exhaust valve overlap. More fuel and air equals more horsepower.
  3. Pistons designed to optimize squish or quench during compression/combustion cycle event, resulting in resistance to detonation and pre-ignition. The end product is longer engine life and increased horsepower potential.
  4. Complex piston skirt profiles that reduce power robbing friction, yet promoting stability in bore for optimum ring seal.
  5. Precision machined ring grooves with proper orifice/accumulator volume using calculated groove root diameters and axial widths, featuring excellent surface finish and flatness providing maximum ring seal and minimizes blow-by and oil consumption.
  6. World class forging facility that utilizes the latest technologies featuring complex forged shapes, advanced materials, and featured aligned grain flow technology.
Piston prices marked with an * do not include rings.
If you need rings, please order them here:
Rings with purchase of Wiseco Pistons:
Rings: Price/Set Buy Now Rings: Price/Set Buy Now
4 Cyl $79
6 Cyl $119
Rings purchased alone:
Rings: Price/Set Buy Now Rings: Price/Set Buy Now
4 Cyl $99
6 Cyl $139
 
GM Multiple Models 2002 Ecotec 2.2L (& Cobalt 02-06)
Part # Buy Now Bore
MM/Inch
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Volume
Comp Ratio Pin
Dia.
Notes
Inches K582M86
$439
86.00/3.386 std. 3.724 - 1.053 - FT OCC 10:1 .787 1
Metric K582M865
$439
86.50/3.405 .020 94.6mm - 26.8mm - FT OCC 10:1 20mm 1

Inches K583M86
$439
86.00/3.386 Std. 3.724 - 1.053 - -8 8.9:1 .787 1
Metric K583M865
$439
86.50/3.405 .020 94.6mm - 26.8mm - -8 8.9:1 20mm 1
 
GM Multiple Models 1996-02 (LD9 2.4L - non quad 4)
Part # Buy Now Bore
MM/Inch
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Volume
Comp Ratio Pin
Dia.
Notes
Inches K584M900
$439
90.00/3.543 Std. 3.701 5.709 1.181 61.5 -7.5 9:0 .866 1
Metric K584M905
$439
90.50/3.563 .020 94mm 145mm 30mm 61.5 -7.5 9:0 22mm 1
 
Geo 4AFE Prism 1989-92  (16V DOHC 1587cc)
Part # Buy Now Bore
MM/Inch
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Volume
Comp Ratio Pin
Dia.
Notes
Inches K003M810
$459*
81.0/3.189 std 3.030 4.800 - - - 10.2:1 18mm 3
Metric K003M815
$459*
81.5/3.209 .020 77mm 4.800 - - - 10.2:1 18mm 3
* Non-coated, not supplied with rings.
 
Geo 4AFE Prism 1993-97  (16V DOHC 1587cc)
Part # Buy Now Bore
MM/Inch
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Volume
Comp Ratio Pin
Dia.
Notes
Inches K004M810
$459*
81.0/3.189 std 3.030 4.800 - - FT 10.2:1 to
10.5:1
20mm 3
Metric - - - - - - - - - - - -
* Non-coated, not supplied with rings.
 
GM Ecotec 2.4L (Solstice, Saturn Sky, Cobalt) 2007
Part # Buy Now Bore
MM/Inch
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Volume
Comp Ratio Pin
Dia.
Notes
Inches K024M880
$459*
88.0 std 3.858
(98mm)
5.659
(143.75 mm)
1.092 - 16.0cc
(dish)
8.5-1 .787
(20mm)
3
Metric K024M885
$459*
88.5 .020 3.858
(98mm)
5.659
(143.75 mm)
1.092 - 16.0cc
(dish)
8.5-1 .787
(20mm)
3
* Non-coated, not supplied with rings.
 
GM 2.0 LNF turbo 2005+ Solstice GXP, Saturn Redline, Chevy HHR SS, Saab 9-3 2.0,
Part # Buy Now Bore
MM/Inch
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Volume
Comp Ratio Pin
Dia.
Notes
Inches K635M86
$439
86/3.386 std 86.000 - 1.215 - 0 9.2 .866
(22mm)
1
Metric K635M865
$439
86.5/3.405 .020 3.386 - 30.85 - 0 9.2 .866
(22mm)
1
  K635M88
$439
88.00/3.464 .080 same as above 1
 
Notes:
#1 Most Wiseco pistons have offset pins. Pins must be offset the same as o.e. for quietest operation - Pin offset will be opposite of direction of engine rotation.
#3. Non-coated, not supplied with rings.
#4 This piston made w/stock compression height, which is very close to cylinder head. Use Cometic thick gasket if decking block.
Notes: that apply to all Part #'s:
*
Some pistons are listed with a range of compression ratio's. The low number is determined w/an un-cut deck and the high number is determined w/.030 piston to cylinder head clearance.
* Always check pistons to valve clearance - If using VTEC or like mechanisms- check w/longer duration higher lift lobe.
* Always run at least .030 piston to head clearance including gasket thickness.
* If piston appears to be different than expected, please do not hesitate to call Wiseco at 800-321-1364 to verify proper installation specifications.
 
 
 
 
 
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