Manley Platinum Series Forged Piston - STD Size - 99.50mm Grade B - 04+ Subaru WRX STi EJ257

Regular price $153.61 USD Sale price $153.61 USD Regular price $180.00 USD
Sale 14.66% $26.39 USD (14.66%)
In Stock!
SKU: man612000CB-1
Product Description

The Manley Performance Platinum Series Lightweight Pistons are strong, lightweight but robust enough to ensure long lasting service life. They utilize offset wrist pins to create a quieter start up! These provide a Drop-In installation!

Recommended clearance of .003" for mildly boosted and .0035" for highly boosted vehicles measured .850" (79/83mm Strokes) and 1.100" (75mm Stroke) from the bottom of the oil ring groove.

This piston features a skirt diameter that corresponds to the OEM Grade B bore. Check the bore grades on the top of your block and order the appropriate quantities of Grade A or B pistons. 


  • Subarus with EJ25 Motor


Made from 2618 High Strength Material for superior weight to strength ratio
Offset wrist pins designed for quieter start-ups
All Pistons come with moly coated skirts
"Total Seal" Round Wire Locks, Chrome Moly Wrist Pins & Premium Steel Top Ring Sets Included
Sold Individually (Add the appropriate amount of quantity)

Extended Information

Type: Forged Pistons (Dish)
Material: High Strength 2618
Compression Ratio: 8.5:1
Item Weight: 395 [grams]
Bore Diameter: 99.50 [mm]
Size: Standard (STD)
Stroke: 79 [mm] 
Rod: Standard Size 5.137[inches]
Compression Height: 30.7 [mm] / 1.209 [inches]
Head cc's: 51
Dome Volume: -22 cc
Bore Oversize: Grade B
Engine Code: EJ25
Notes: Pins and Rings Included

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck & international items, will require up to 7 business days to ship due to size and logistics.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Unless otherwise noted as "In Stock" or exact ETA. Special Order items have an ETA of 5+ weeks.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $100.

All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

Processing and logistics on in stock international orders can take up to 7 business days to process & ship.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

Customer Reviews

No reviews yet