Manley Performance valve springs are specifically designed to withstand the rigors of today's aftermarket sport compact camshafts and provide proper valvetrain control in high-revving sport compact engine applications. This means using only the finest ultra-clean chrome silicon high-tensile steel alloys, executing proprietary heat treating and shot peening processes to ensure ultimate fatigue life and limit load loss.
Manley titanium retainers are manufactured to strict tolerances on the finest dual-spindle CNC machines to provide a superior, jewel-like finish. We use tough, certified, heat-treated aerospace-grade titanium bar stock. Retainer angles are held within 6' (minutes), which is one-tenth of a degree, and installed heights are held within .005". Titanium retainers are a must for high RPM sport compact engines; their reduced weight allows the tuner to increase engine speed and avoid dangerous valve float without sacrificing reliability.
- Outer/Inner Diameter: 1.180"/.870"
- .865"/.660"
- Seat Pressure: 84 @ 1.315"
- Open Pressure: 199 @ .945"
- 245 @ .815"
- Stock/Max Lift: .370"/ .500"
- Coil Bind: .765"
- Rate (lbs/inch): 310
Spring Part Number: 22185-16
Retainer Part Number: 23185-16
Before You Order
〇 Regarding Import Consumption Tax
At Shafutoya Shopping Site, we pay the import consumption tax incurred during importation on your behalf, so there will be no additional charges beyond the total amount paid at checkout.
〇 Confirmation of Fitment
Since our entire product database is based on North American vehicles (USDM), please confirm whether or not parts can be installed on Japanese vehicles (JDM) before ordering. (Please feel free to contact us if you are unsure whether the listed product is compatible with your vehicle. Our support team will be happy to look into it for you.)
If you order without confirming fitment, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the year, manufacturer, and vehicle model in the tabs on our top page, this does not necessarily mean 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 checkout. Shipping quotes are calculated automatically once you enter your shipping address on the checkout page. For large items such as body parts, the automatically calculated shipping cost may rarely differ significantly from the actual cost. In such cases, we will contact you individually via email.
Essentially, all products are shipped internationally from our U.S. warehouse. Unlike domestic delivery within Japan, international shipping takes approximately 7 to 14 days, so please order with time to spare. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all products are transported by air freight; they are never shipped by sea.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
All products we handle are designed and manufactured outside of Japan. Please understand that they do not comply with the "Japanese Vehicle Inspection System," and we cannot provide strength calculation documents for Japanese inspection purposes. Therefore, all parts are sold for the purpose of "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. Since all products are shipped internationally from outside Japan, there is a possibility of shipping damage to the packaging or the products themselves. Please understand that we will only provide returns, refunds, or exchanges for products with shipping damage, defective products, or items different from your order if you contact us within 7 days of receipt. Please also note that for products sold through us, warranty support will be provided "only through us." We do not provide support through other companies or agencies located within Japan.