Includes premium chrome moly wrist pin and round wire locks.
This is one Piston.



Note: Includes premium chrome moly wrist pin and round wire locks.
Car Make: Subaru
Car Model: Impreza WRX / WRX STi
Years: 2004-2018 STi / 2006-2014 (WRX)
Engine: EJ255 / EJ257
Included Ring Set: 46995DT-1
Compression Ratio: 9.0:1 WRX / 8.5:1 STi
Face Type: Dish
Dome CC: -17cc
Head CC: 51 cc (WRX) / 57cc (STI)
Gram Weight: 417 g
Pin Size: 23mm
Compression Height: 1.209
Rod Length: 5.137
Stroke: 3.110
Bore: 99.50mm
Material: 2618
Bore Size: Grade B
Standard Pin (Included): 42346
Upgraded Pin (Not Included): 42547

EJ25 - PLATINUM SERIES TURBO TUFF GRADE A PISTON

(Sold as -1 individual piston, not sets.)


These pistons feature skirt diameters that correspond to the OEM Grade A or B bores resulting in a piston to wall clearance range of .0023" - .0031".

Please check the bore grades on the top of your block and order the appropriate quantities of Grade A or B pistons.


The best aftermarket Subaru piston company just got even better with our new Turbo Tuff lineup targeted specifically for EJ25 engines. By incorporating proven design enhancements from our "Formula-Won" piston forging, we've created the ultimate Subi piston to withstand the rigors of the highest boosted and stressed applications yet still run "quietly" and trouble-free for the daily driver. Like all Manley Subaru pistons, these are made from 2618 alloy, utilize an offset wrist pin design, are skirt coated and include our standard 2.500" x .180" wall premium chrome moly wrist pin (P/N 42346). 9310 alloy .250" wall pin upgrades are available.


Manley Subaru EJ257 pistons now include Napier style second rings and higher tension oil rings (by Total Seal) for superior oil control.

• 2618 high strength material
• Offset wrist pin for quiet start-ups
• 2.500” x .180” wall Premium Chrome Moly pin (Standard Series) included P/N 42346
• Pressure balance groove
• Will accommodate +1mm valve sizes
• Premium Steel top rings with Napier seconds and round wire locks included
• Recommended piston clearance: .003” for mildly boosted and .0035” for highly boosted measured .850” (79/83mm stroke) and 1.100” (75mm stroke) from the bottom of the oil ring

WE CAN ONLY SHIP TO THE ADDRESS ENTERED DURING CHECKOUT.
Most domestic orders ship within 5 days, please allow up to 7-10 days for international orders to ship.
We are very familiar with International Export procedures and we ship out of the country every day. If you are a customer outside of the United States of America, have no worries, we will get your parts to you quickly and correctly, many times just as quickly as our domestic shipments.

Some shipping destinations will require additional shipping, these customers will be contacted immediately after placing their order. Feel free to contact us before placing your purchase for an exact shipping quote.

Import Duties, Taxes, and Charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

Quoted shipping does not include insurance. If you would like to add insurance to your contact us here to go over the options.

Please note that eBay requires all orders $750.00 and above to have Signature confirmation, so if your package total is $750.00 or more, your shipment will require a signature.

Even though we are based in Florida, not all orders ship complete from our Florida location. Please be aware that some parts will ship directly from other states to your location. Please message us before clicking buy-now to check location availability if this is a concern of yours.

PLEASE NOTE, ORDERS TO THE FOLLOWING COUNTRIES WILL BE SHIPPED VIA USPS INTERNATIONAL TO AVOID DELAYS AND COMPLICATIONS, UNLESS SPECIFICALLY REQUESTED BY THE BUYER TO SHIP VIA UPS:

- Russia
- Brazil
- Greece