Engines and Components› Pistons and Piston Rings

Wossner

Forged Piston Kit, 100.00mm Bore, 8.0:1 Compression, 2.5L

$879.79

SKU: K9477DA

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The Wossner K9477DA piston kit is a performance-oriented component designed for the Porsche 944 and 945 models. This kit features pistons with a bore size of 100.00mm and a piston size of 99.92mm, resulting in a displacement of 2479 ccm. It is engineered for the 2.5L 8V Turbo engine with the M44 engine code, and maintains a compression ratio of 8.0:1.
Show original supplier description
The Wossner K9477DA piston kit is a high-performance upgrade meticulously crafted for the Porsche 944 and 945 models, specifically targeting the 2.5L 8V Turbo engine (M44 engine code) produced between 1984 and 2001. This kit includes precisely machined pistons with a 100.00mm bore size and a 99.92mm piston size, contributing to a total displacement of 2479 ccm. The pistons are designed to maintain an 8.0:1 compression ratio, suitable for turbocharged applications. The kit also comes with a four-stroke ring set, part number (1000XPY), featuring specific dimensions of 1.5 x 1.2 x 2.5mm for optimal performance and sealing. The specified compression ratio ensures efficient combustion within the turbocharged engine environment.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandWossner
Part NumberK9477DA
CategoryEngines and Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy