Manley Performance 2004+ Subaru WRX STI 99.50mm STD Bore 1.2mm Double Tabbed Ring Pack 0XFXN
EJ25 - PLATINUM SERIES LIGHTWEIGHT PISTONS
Manley pistons are machined of high strength 2618 material. Each design is lightweight yet robust enough to deliver long service life. Offset wrist pin design is utilized for quiet start-ups. Perfect ring groove to skirt squareness is achieved through our unique "one fixturing" manufacturing method that assures maximum horsepower. All pistons come with moly coated skirts. Round wire locks, premium chrome moly wrist pins, and premium steel top ring sets from Total Seal are included with every kit at no additional charge. 9310 alloy upgraded wrist pins are available. Recommended clearance: .003" for mildly boosted and .0035" for highly boosted measured .850" (79/83mm Strokes) and 1.100" (75mm Stroke) from the bottom of the oil ring groove.
Manley Subaru EJ257 pistons now include Napier style second rings and higher tension oil rings (by Total Seal) for superior oil control.
| Part # | Bore Size (mm) | Over Size | Rod Length | Stroke | Comp. Distance | Dome Volume (cc) | Cylinder Head (cc) |
Comp. Ratio | Piston Type | Piston Wt / Gms | Included Ring Set | |
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| Subaru WRX Sti 2004-up - EJ257 .9055"/23mm x 2.500" Pin x .180" Wall | ||||||||||||
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| 75mm De-Stroked (2.35L) | ||||||||||||
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| 621000C-4 | 99.5 | STD | 5.137" | 75 | 1.285" | -18 | 51 | 8.5 | Dish | 429 | 46995DT-4 | |
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| 621002C-4 | 99.75 | +.25mm | 5.137" | 75 | 1.285" | -18 | 51 | 8.5 | Dish | 434 | 46997DT-4 | |
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| 621005C-4 | 100 | +.5mm | 5.137" | 75 | 1.285" | -18 | 51 | 8.5 | Dish | 438 | 461000DT-4 | |
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| 621100C-4 | 99.5 | STD | 5.137" | 75 | 1.285" | -6 | 51 | 9.8 | Flat Top | 462 | 46995DT-4 | |
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| 621102C-4 | 99.75 | +.25mm | 5.137" | 75 | 1.285" | -6 | 51 | 9.8 | Flat Top | 465 | 46997DT-4 | |
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| 621105C-4 | 100 | +.5mm | 5.137" | 75 | 1.285" | -6 | 51 | 9.8 | Flat Top | 469 | 461000DT-4 | |
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| 79mm STD Stroke (2.5L) | ||||||||||||
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| 612000CA-1* | 99.50 Grade A | STD | 5.137" | 79 | 1.209" | -22 | 51 | 8.5 | Dish | 395 | 46995DT-1 | |
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| 612000CB-1* | 99.50 Grade B | STD | 5.137" | 79 | 1.209" | -22 | 51 | 8.5 | Dish | 395 | 46995DT-1 | |
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| 612000C-4 | 99.5 | STD | 5.137" | 79 | 1.209" | -22 | 51 | 8.5 | Dish | 395 | 46995DT-4 | |
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| 612001C-4 | 99.55 | +.05mm | 5.137" | 79 | 1.209" | -22 | 51 | 8.5 | Dish | 395 | 46995DT-4 | |
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| 612002C-4 | 99.75 | +.25mm | 5.137" | 79 | 1.209" | -22 | 51 | 8.5 | Dish | 398 | 46997DT-4 | |
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| 612005C-4 | 100 | +.5mm | 5.137" | 79 | 1.209" | -22 | 51 | 8.5 | Dish | 402 | 461000DT-4 | |
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| 612100C-4 | 99.5 | STD | 5.137" | 79 | 1.209" | -10 | 51 | 9.8 | Dish | 419 | 46995DT-4 | |
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| 612102C-4 | 99.75 | +.25mm | 5.137" | 79 | 1.209" | -10 | 51 | 9.8 | Dish | 423 | 46997DT-4 | |
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| 612105C-4 | 100 | +.5mm | 5.137" | 79 | 1.209" | -10 | 51 | 9.8 | Dish | 426 | 461000DT-4 | |
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| 83mm Stroker (2.6L) | ||||||||||||
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| 622000C-4 | 99.5 | STD | 5.137" | 83 | 1.130" | -26 | 51 | 8.5 | Dish | 379 | 46995DT-4 | |
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| 622002C-4 | 99.75 | +.25mm | 5.137" | 83 | 1.130" | -26 | 51 | 8.5 | Dish | 383 | 46997DT-4 | |
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| 622005C-4 | 100 | +.5mm | 5.137" | 83 | 1.130" | -26 | 51 | 8.5 | Dish | 386 | 461000DT-4 | |
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| 622100C-4 | 99.5 | STD | 5.137" | 83 | 1.130" | -14 | 51 | 9.8 | Dish | 414 | 46995DT-4 | |
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| 622102C-4 | 99.75 | +.25mm | 5.137" | 83 | 1.130" | -14 | 51 | 9.8 | Dish | 415 | 46997DT-4 | |
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| 622105C-4 | 100 | +.5mm | 5.137" | 83 | 1.130" | -14 | 51 | 9.8 | Dish | 418 | 461000DT-4 | |
Vehicle Fitment
Subaru WRX
2011 Subaru WRX STI 2.5L
2010 Subaru WRX STI 2.5L
2009 Subaru WRX STI 2.5L
2008 Subaru WRX STI 2.5L
2007 Subaru WRX STI 2.5L
2006 Subaru WRX STI 2.5L
2005 Subaru WRX STI 2.5L
2004 Subaru WRX STI 2.5L