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Manley Performance 9.8:1 Compression Ratio Pistons | 04-15 Subaru WRX/STI 99.75mm Standard Bore (632302C-4)

Manley Performance 9.8:1 Compression Ratio Pistons | 04-15 Subaru WRX/STI 99.75mm Standard Bore (632302C-4)

SKU:MAN632302C-4

Regular price ¥147,643
Regular price Sale price ¥147,643
(Duties & import taxes included)
Import Duties & Taxes

The displayed price includes import duties and taxes. In principle, no additional payment is required upon delivery. If the shipping carrier nevertheless charges you import duties or taxes upon delivery, please pay the charges first. Shaft Shop will reimburse you for the amount paid.

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Manley has recently released a line of Turbo Tuff pistons specifically for the EJ25 engine. By incorporating proven design enhancements from our "Formula-Won" piston forging, we have created the ultimate Subaru piston that can withstand the harsh conditions of high-boost, high-stress applications while still operating "quietly" enough for a daily driver. 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 number in the column below. These are equipped with 9310 pins (P/N 42546). Each set includes premium steel top rings, Napier-style second rings, and high-tension oil rings for ultimate oil control, along with round wire locks. Recommended clearance: 0.003" for mild boost, 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 Placing Your Order

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.

Compatibility Confirmation
As our product database is based entirely on North American vehicles (USDM), please confirm compatibility with Japanese 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 look into it for 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, manufacturer, and vehicle model via the tabs on our top page, this does not guarantee that they will fit Japanese models without modification.
All products have been translated into Japanese using translation software. Due to the potential for confusing expressions, please contact us before ordering if you have any questions.

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

All products are generally shipped internationally from our U.S. warehouse. Unlike domestic shipping in Japan, international shipping takes approximately 7 to 14 days, so please allow plenty of time for your order. If you are in a hurry, please contact us in advance to confirm delivery times. All products are transported via air freight. They are not shipped via sea freight.

○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
Please note that all products we handle are designed and manufactured outside of Japan. They are not compliant with the "Japanese Vehicle Inspection System," and we are unable to provide strength study documents or similar certification for the Japanese inspection system. Therefore, all parts are sold for "use on circuits, private property, or off-road," and installation and use are at your own risk.

○ Regarding Warranty
Please check the contents immediately upon arrival. As all products are shipped internationally from outside Japan, there may be shipping damage to the packing boxes or the products themselves. Please understand that we will only provide returns, refunds, or replacement products for damaged, defective, or incorrect items if notified within 7 days of receipt. Furthermore, for products sold through us, warranty support will be handled "only through us." Please note that we do not coordinate with other companies or agencies located within Japan for these matters.