Manley Performance 9.8:1 Compression Ratio Pistons | 04-15 WRX/STI Extreme Duty Stroker 99.5mm Standard Bore Size (632500CE-4)

Manley has recently released a line of Turbo Tuff pistons specifically for the EJ25 engine. By incorporating design enhancements proven through "Formula-Won" piston forging, we have created the ultimate Subaru piston that withstands the harsh conditions of high-boost, high-stress applications while still operating "quietly" enough for a daily driver. < eol>Like all Manley Subaru pistons, these are made from 2618 alloy, feature an offset wrist pin design, include skirt coating, and come with standard 2.500" x 0.180" wall premium chrome moly wrist pins (P/N 42346). A 9310 alloy 0.210" wall pin upgrade is available. Simply order the EXTREME DUTY part numbers in the column below; these are equipped with 9310 pins (P/N 42546). They include premium steel top rings, Napier-style second rings, and high-tension oil rings for ultimate oil control, along with round wire locks in each set. Recommended clearance: 0.003" for mild boost and 0.0035" for high boost, measured 1.100" from the bottom of the oil ring groove.Manley Subaru EJ257 pistons now include Napier-style second rings and high-tension oil rings (manufactured by Total Seal) for superior oil control.

Before Ordering

〇 Regarding Import Consumption Tax
At the Shaftoya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so there are no additional charges beyond the total amount paid at checkout.

〇Compatibility Confirmation
Our entire product database is based on North American vehicles (USDM), so please verify compatibility with Japanese domestic vehicles (JDM) before placing your order. (If you are unsure whether a listed product fits your vehicle, please feel free to contact us. Our support team will be happy to assist you.)
If you place an order without confirming compatibility, we cannot accept returns due to fitment issues.
Please note that even if products are sorted by selecting the year, make, and model on our homepage tabs, this does not guarantee that they will fit Japanese model vehicles without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.

○ Regarding Delivery
Shipping costs are paid at the time of payment. Shipping estimates are automatically calculated when you enter your shipping address on the checkout page. For large items such as body parts, the automatically calculated shipping cost may occasionally differ significantly from the actual cost. In such cases, we will contact you individually via email.

Basically, all products are shipped internationally from our US warehouse. Unlike domestic Japanese shipping, international delivery takes approximately 7 to 14 days, so please allow plenty of time when ordering. If you are in a hurry, please contact us in advance to check the delivery time. Note that all products are transported by air; they are not shipped by sea.

○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
Essentially, all products we handle are designed and manufactured outside of Japan. Please understand that they are not compliant with the "Japanese vehicle inspection system" (Shaken), and we cannot provide structural review documents or similar paperwork for this purpose. Therefore, all parts are sold for "use on circuits, private land, or off-road," and installation and use are at your own risk.

○ Regarding Warranty
Please inspect the contents immediately upon arrival. Since all products are shipped internationally from outside Japan, there is a possibility of shipping damage to the packaging or the product itself. Please understand that we will only provide returns, refunds, or replacements for products with shipping damage, defects, or incorrect items if notified within 7 days of receipt. Additionally, for products sold through us, warranty support will be handled "exclusively through us." Please note that we do not coordinate with other companies or agencies within Japan for these services.