See all Engine products
Product thumb
Manley 100.00mm +.5mm 8.5 Platinum Series Dish Piston Set w/ Rings Subaru WRX Sti EJ257 2.5L 2004+
$699.23

Upgrade Your Subaru WRX STI with Manley Platinum Series Dish Piston Set

If you're looking to boost your Subaru WRX STI's performance, the Manley 100.00mm +.5mm 8.5 Platinum Series Dish Piston Set w/ Rings is a game-changer. Designed specifically for the Subaru EJ257 2.5L engine (2004+), this piston set offers a perfect blend of strength, durability, and performance. Let’s dive into what makes this product a must-have for your vehicle.

Key Features

  • High-Strength Material: Crafted from advanced 2618 alloy, these pistons are lightweight yet incredibly strong, ensuring a long service life.
  • Quiet Start-Ups: The offset wrist pin design minimizes noise during engine start-up, providing a smoother experience.
  • Precision Engineering: Manley's unique "one fixturing" manufacturing method guarantees perfect ring groove to skirt squareness, maximizing horsepower.
  • Moly Coated Skirts: Each piston features moly-coated skirts for reduced friction and enhanced durability.
  • Complete Kit: The set includes round wire locks, premium chrome moly wrist pins, and top-quality steel top ring sets from Total Seal—all at no extra cost!
  • Upgraded Options: For those looking for even more strength, upgraded 9310 alloy wrist pins are available.

Specifications

  • Bore Size: 100.00 mm
  • Over Size: +.5 mm
  • Rod Length: 5.137 inches
  • Stroke: 79 mm
  • Compression Distance: 1.209 inches
  • Dome Volume: -17 cc
  • Cylinder Head Volume: 57 cc
  • Compression Ratio: 8.5:1
  • Piston Type: Dish
  • Piston Weight: 420 grams
  • Premium Steel Top Rings: 461000DT-4

Fitment

  • Designed for Subaru WRX STI (2004 and newer) with EJ257 engine, featuring a pin size of .9055"/23mm x 2.500" and a wall thickness of .210".

Customer Feedback

Many Subaru enthusiasts have praised the Manley Platinum Series Piston Set for its performance enhancements. Customers have reported noticeable improvements in engine responsiveness and overall power delivery. The high-quality construction and attention to detail have earned this product rave reviews, making it a favorite among tuners and racers alike.

Upgrade your Subaru WRX STI with the Manley 100.00mm +.5mm 8.5 Platinum Series Dish Piston Set and experience the difference in performance and reliability. Your engine will thank you!

Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Manley Logo

How did Manley Performance Start?

Manley Performance, formerly called Manley Speed Equipment, was established in 1966 by Hank Manley shortly after his graduation from Brown University. His interest in the performance and racing traced back to 1960 when, at age 17, he rebuilt a 312 CID Ford V8 engine, installed a camshaft and three two-barrel carbs, and raced a ’56 Thunderbird on New Jersey’s streets. Initially, the company’s product lineup included stainless valves, lifters, camshafts, forged pistons, vanadium valve springs, pushrods, and timing chain kits. By 1998, Manley had outgrown its first Bloomfield, New Jersey facility and bought several acres in Lakewood, New Jersey. It was around this time that the brand’s name formally changed to Manley Performance. Nearly a decade later, the production space doubled in size.

Evolving in the Automotive Space

Led by GM Michael Tokarchik in 2002, Manley entered the high-performance passenger car market as an OEM supplier of connecting rods for the 2003/2004 Ford SVT Mustang Cobra. Production reached 2500 rods per week without missing a single delivery date. Ford awarded Manley its highest ever supplier rating. Manley’s presence in the OEM market continued from there as a supplier for the Ford GT. After nearly 50 years since its inception, Manley continues to be globally recognized as the leading manufacturer of performance valves, connecting rods, cylinder head components, pushrods, drive and oil systems, and several other engine parts.

What is Manley’s Specialty?

Manley Performance specializes in high-performance engine internals that range from stock replacements to full-on race applications. They have been the standard of the industry since their inception; a fact that still remains true now as they have ventured into new markets. Today, Manley Performance continues to re-define itself in a high-performance aftermarket industry that is constantly evolving. The brand has developed a wide range of new products for growing markets that include sport compact, Ford modular, and Chevy LS. Manley also maintains its leadership role with the traditional V8 engine business.

Get Manley Performance at Vivid Racing

If you are in need of a serious upgrade to your engine, then Manley Performance parts should be on your list. Like all of our suggested manufacturers, Manley uses the best materials available to ensure a quality part for your engine. We carry Manley connecting rods, crankshafts, pistons, and valve components. The large lineup of domestic parts includes sport compact vehicles, Ford modular engines, GM’s LS series internals, and HEMI product upgrades for Chrysler.

If you can’t find what you’re looking for or need help choosing the right part for your car, call our sales team at (480) 966-3040. We are here to make your buying experience a breeze.

Due to the intended usage of the products sold by Manley Performance Products, Inc., they are sold WITHOUT WARRANTY OR ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR THE INTENDED PURPOSE. Manley Performance Products, Inc. shall not, under any circumstances, be liable for any special, consequential or incidental damages, including but not limited to loss of profits or revenue, loss of other property or equipment, cost of purchased or replacement of goods, or claims by customers of the purchaser, which may arise and/or result from the sale, installation or use of these parts. Installation of parts intended for “off-highway” use could adversely affect the vehicle manufacturer’s warranty coverage. Subject to applicable state law. Some items may not be legal for use in California on pollution controlled vehicles. All weights specified are approximate and subject to manufacturing tolerances. Manley Performance Products, Inc. reserves the right to make changes in design, specifications, materials, or make product changes without incurring liability or obligation with respect to similar product previously manufactured. If technical advice is offered or given in connection with the use of any Products it will be as an accommodation to Buyer and without charge and Seller shall have no responsibilities or liabilities whatsoever for the content or use of such advice.
You're seeing this because you're logged into an employee account or you're accessing the site through an internal IP address. This information is not normally visible.
Things
Sale price None
Wholesale price $681.59
Shipping Weight: 5.80
Length: 11
Width: 11
Height: 4
Product Added At Thursday 04 August, 2022
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By Turn_API
View In Admin

Emissions Info
Carb Approved No
Carb Number -
Epa Status N/A
Prop65 Yes
Carb Required -
Vendors
Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.
Vendor Inv Cost Retail Jobber MAP Core Updated
Turn 14 $577.62 $760.03 ? $699.23 ? 2025-07-11 10:31:58


Check out these other great products