AASCO Lightweight Steel Flywheel – Porsche 987.2 Boxster S / Cayman S / R / Spyder Manual 2009-2012

Part Number: 106422-12
Brand: AASCO Motorsports

AASCO Fitment Guide

Upgrade your manual Porsche 987.2 Boxster or Cayman with an AASCO lightweight steel flywheel designed to reduce rotating mass and dramatically improve engine response while retaining the factory OEM pressure plate setup. This 17.2 lb flywheel replaces the heavier factory 27 lb dual-mass flywheel setup on compatible Porsche 987.2 Boxster S, Boxster Spyder, Cayman S, and Cayman R models, removing approximately 9.8 lb of rotating mass. The result is an engine that revs more freely, responds more sharply, and feels more alive during downshifts, heel-toe shifting, and spirited driving.

At DasMotoring, this is one of our favorite upgrades for a manual Porsche. A lightweight flywheel can completely change the character of the car — making it feel sharper, more mechanical, and more connected. If your 987.2 Boxster or Cayman has started to feel a little too slow or soulless, this is one of those upgrades that can reignite your love for the car and give it some of that 911 S/T-inspired character and flair.

We have run AASCO lightweight flywheels on our own manual Porsches for years through daily driving, traffic, backroad driving, and track use with excellent results.

This is a great choice for drivers looking for a more responsive, motorsport-inspired feel from their manual 987.2 Boxster or Cayman while retaining the factory OEM pressure plate configuration. The AASCO flywheel is a lightweight steel design, which can be a nice balance for street-driven cars that want sharper response without going to the lightest possible flywheel setup.

Fitment

Fits select manual transmission Porsche 987.2 Boxster and Cayman models:

• 2009–2012 Porsche Boxster S, 987.2 chassis, 3.4L

• 2011–2012 Porsche Boxster Spyder, 987.2 chassis, 3.4L

• 2009–2012 Porsche Cayman S, 987.2 chassis, 3.4L

• 2012 Porsche Cayman R, 987.2 chassis, 3.4L

This flywheel is intended for select manual transmission Porsche 987.2 Boxster / Cayman applications using the factory OEM pressure plate setup.

This flywheel is not intended for Tiptronic, PDK, 987.1, base 2.9L, or non-DFI applications unless specifically confirmed. For base 2.9L 987.2 applications, use the correct base-model flywheel listing instead.

Product Details

• AASCO lightweight steel flywheel

• Part number: 106422-12

• Designed for select Porsche 987.2 Boxster / Cayman manual applications

• For use with the factory OEM pressure plate

• Flywheel weight: approximately 17.2 lb

• Factory flywheel weight: approximately 27 lb

• Approximate rotational mass savings: 9.8 lb compared to the factory flywheel

• Lightweight steel construction

• Reduces rotating engine mass compared to the factory dual-mass flywheel

• Helps the engine rev faster

• Improves throttle response and rev-matching feel

• Flywheel-only listing

Driving Feel

A lightweight flywheel reduces rotating mass at the engine, allowing the engine to gain and lose RPM more quickly. The result is a sharper, more immediate connection between your right foot, the engine, and the gearbox. Rev-matched downshifts feel cleaner, throttle blips feel more natural, and the car takes on a more responsive, motorsport-style personality.

Because the flywheel is lighter than the factory dual-mass flywheel setup, some additional drivetrain noise, gear rollover sound, or chatter may be present. This is normal for many lightweight flywheel conversions and is part of the more mechanical driving experience.

The best way to minimize NVH and gearbox chatter is to avoid lugging the engine. Drivers should never lug the engine to begin with, and this is especially important with a lightweight flywheel. Keeping the engine above approximately 2,000 rpm, or selecting a lower gear when climbing hills or accelerating from low speed, will help keep the drivetrain happier and reduce unwanted chatter. The higher the rpm, the less drivetrain chatter and NVH you will have.

Which Version Should I Buy?

AASCO offers several similar-looking lightweight flywheel and clutch options for the 987 Boxster / Cayman platform. The correct choice depends on your chassis, engine, and pressure plate configuration.

This listing is for the AASCO 106422-12 flywheel only. It is the right choice if your 987.2 Boxster S, Boxster Spyder, Cayman S, or Cayman R is retaining the factory OEM pressure plate setup.

How This Differs From 106412-11

The 106412-11 flywheel is generally used for earlier 986 / 987.1 Boxster and Cayman applications.

The 106422-12 flywheel is for later 987.2 direct-injection applications using the factory OEM pressure plate setup.

Do not assume the earlier 106412-11 flywheel is correct for a 987.2 car. For compatible 987.2 applications using the factory OEM pressure plate, use 106422-12.

OEM Pressure Plate vs. Sachs Performance Package

For 987.2 Boxster / Cayman applications, the correct AASCO option depends on the clutch and pressure plate setup:

• If your 987.2 Boxster / Cayman is using the factory OEM pressure plate, use 106422-12.

• If your 987.2 Boxster / Cayman is being converted to the Sachs Performance clutch / pressure plate setup, use the complete 106423-12-PKG kit instead.

Good Candidates for This Flywheel-Only Listing

This flywheel-only listing is generally intended for:

• 987.2 Boxster S manual applications using the factory OEM pressure plate

• 987.2 Boxster Spyder manual applications using the factory OEM pressure plate

• 987.2 Cayman S manual applications using the factory OEM pressure plate

• 987.2 Cayman R manual applications using the factory OEM pressure plate

• Cars that already have a compatible factory pressure plate setup in good condition

• Cars replacing an existing AASCO 106422-12 flywheel

• Drivers who want the lightweight flywheel only rather than a complete clutch package

When to Buy the Complete Kit Instead

Choose a complete AASCO flywheel and Sachs Performance clutch kit instead of this flywheel-only listing if:

• Your clutch is worn or due for replacement

• Your pressure plate is worn, heat-spotted, damaged, or unknown

• You are converting from the factory pressure plate setup to the Sachs Performance clutch / pressure plate setup

• You want everything matched together as a complete flywheel, clutch, pressure plate, release bearing, and hardware package

For compatible 987.2 Boxster / Cayman applications converting to the Sachs Performance clutch / pressure plate setup, use 106423-12-PKG instead.

If you are unsure which version you need, contact us with your year, model, engine, transmission, and current clutch setup so we can help point you toward the correct AASCO option.

Important Notes

This listing is for the flywheel only. Clutch components, pressure plate, release bearing, hardware, and related installation parts are not included unless specifically stated.

This flywheel is specifically for compatible 987.2 Boxster / Cayman applications using the factory OEM pressure plate. Fitment may depend on the vehicle’s model year, engine, transmission, and clutch / pressure plate configuration. Always confirm compatibility with your exact vehicle before ordering.

Professional installation is recommended. However, there are DIY how-to guides linked below if you have the tools and equipment at home.

Before installation, compare the new flywheel and related components to the original components being replaced.

Availability

AASCO Motorsports parts are specialty performance components. Although many items are available from stock, occasional delays may occur if an item is backordered or if AASCO is manufacturing a new batch. If there is a delay, we will provide an updated ETA before fulfillment.

Shipping

• Shipping dimensions: 15 x 15 x 4 in

• Shipping weight: 19 lb