Wiseco Pistons

RPM - RON'S PRECISION MACHINE, INC.
3461 W. 250 N.
Hurricane, Utah 84737
1-435-673-0724 e-mail

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Shelf-Stock Pistons. Sold complete with pistons, rings, wrist pins and circlips. (piston set)
Most piston sets on this page are $507.52 or $532.80. Plus shipping.
Call toll free to purchase at: 1-866-700-5877

Subaru
WRX EJ20-Oct. 1998 and older
Kit Part # Bore MM / Inch Over Sizes Stroke Rod Length Comp Height Head cc's Dome/Dish Volume Gasket Thickness Deck Clearance Block Ht. Comp. Ratio Pin Diameter Ring # Foot Notes
K576M925 92.5/3.641 0.02 2.952 5.137 1.312 -17.8 .9055 9250xx
K576M93 93.0/3.661 0.04 75 130.5 33.32 -17.8 23
WRX -My00-post Oct. 1998
Kit Part # Bore MM / Inch Over Sizes Stroke Rod Length Comp Height Head cc's Dome/Dish Volume Gasket Thickness Deck Clearance Block Ht. Comp. Ratio Pin Diameter Ring # Foot Notes
K575M925 92.5/3.641 0.020 2.952 5.137 1.286 48 -13.5 .054 7.913 8.0 .9055 9250xx
K575M93 93.0/3.661 0.040 75 130.5 32.66 -13.5 1.37 201 23 9300xx
WRX -EJ20-Stroker-Pre Oct. 1998
Kit Part # Bore MM / Inch Over Sizes Stroke Rod Length Comp Height Head cc's Dome/Dish Volume Gasket Thickness Deck Clearance Block Ht. Comp. Ratio Pin Diameter Ring # Foot Notes
K579M925 92.5/3.641 0.020 1.181 -17.8 .9055 9250xx
K579M93 93.0/3.661 0.040 30 -17.8 23 9300xx
WRX 2002 EJ205 - US spec
Kit Part # Bore MM / Inch Over Sizes Stroke Rod Length Comp Height Head cc's Dome/Dish Volume Gasket Thickness Deck Clearance Block Ht. Comp. Ratio Pin Diameter Ring # Foot Notes
Call 92.00 / 3.622 Std. 2.952 5.137 1.286 48 -9 .054 7.913 8.35 .9055 9200xx 1
Call 92.50 / 3.642 .020 75 130.5 32.66 48 -9 1.37 201 23mm 9250xx 1
Call 93.00 / 3.661 .040 9300xx 1

1. Most Wiseco pistons have offset pins. Pins must be offset same as o.e. for quitest operation-pin offset will be opposite of direction of engine rotation
* Some pistons are listed with a range of compression ratio's. The low number is determined w/ an un-cut deck and the higher number is determined w/ .030 piston to cylinder head clearance.
* Always check piston 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 compatibility

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