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AASCO Lightweight Steel Flywheel & Sachs Sport Clutch Kit – Porsche 718 GT4 / Spyder / GTS 4.0 Manual 2020-2025
Part Number: 106435-12-PKG
Brand: AASCO Motorsports
Upgrade your manual Porsche 718 Cayman GT4, 718 Spyder, or 718 GTS 4.0 with a complete AASCO lightweight steel flywheel and Sachs Sport clutch package designed to reduce rotating mass, dramatically improve engine response, and refresh the clutch system at the same time. This kit pairs the AASCO 106447-12 lightweight steel DFI flywheel with compatible Sachs Sport clutch components for select Porsche 718 4.0L manual applications.
Compared to the factory dual-mass flywheel setup, this AASCO lightweight flywheel removes a substantial amount of rotating mass. On the 718 4.0L platform, the factory flywheel weighs approximately 28.5 lb, meaning this 14 lb AASCO flywheel removes approximately 14.5 lb of rotating mass. The result is a sharper, more responsive engine that revs more freely, responds more directly, 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 718 Cayman GT4, 718 Spyder, or 718 GTS 4.0 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 complete kit is a great choice for drivers looking for a more responsive, motorsport-inspired feel from their manual 718 4.0L while also replacing the clutch, pressure plate, release bearing, and related hardware with a matched Sachs Sport clutch package. The AASCO flywheel is a lightweight steel design, which can be a nice balance for street-driven cars that want sharper response without moving to an ultra-aggressive race-style clutch setup.
Fitment
Fits select manual transmission Porsche 718 4.0L models:
2020–2023 Porsche 718 Cayman GT4 4.0
2020–2023 Porsche 718 Spyder 4.0
2021–2025 Porsche 718 Cayman GTS 4.0
2021–2025 Porsche 718 Boxster GTS 4.0
This kit is intended for select manual transmission Porsche 718 4.0L applications using the included AASCO lightweight steel flywheel and Sachs Sport clutch package.
This kit is not intended for non-718 4.0L applications unless specifically confirmed.
Product Details
Complete AASCO lightweight steel flywheel and Sachs Sport clutch kit
Part number: 106435-12-PKG
Includes AASCO lightweight steel DFI flywheel: 106447-12
Includes Sachs Sport pressure plate: 883082999754
Includes Sachs clutch disc: 881861000017
Includes release bearing and required installation hardware
Designed for select Porsche 718 4.0L manual applications
Compatible with select 718 Cayman GT4, 718 Spyder, 718 Cayman GTS 4.0, and 718 Boxster GTS 4.0 manual applications
Flywheel weight: approximately 14 lb
Factory 718 4.0L flywheel weight: approximately 28.5 lb
Approximate rotational mass savings on 718 4.0L applications: 14.5 lb
Lightweight steel construction
Reduces rotating engine mass compared to the factory dual-mass flywheel setup
Helps the engine rev faster
Improves throttle response and rev-matching feel
Matched flywheel and Sachs Sport clutch package
Complete kit 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 significantly 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 lightweight flywheel and clutch options across the Boxster, Cayman, Carrera, Turbo, and GT platforms. The correct choice depends on your chassis, engine, transmission, and clutch package.
This listing is for the AASCO 106435-12-PKG complete kit. It is the right choice if you want the AASCO 106447-12 lightweight steel DFI flywheel, Sachs Sport pressure plate, Sachs clutch disc, release bearing, and installation hardware together as a matched package for your compatible 718 4.0L manual.
Complete Kit vs. Flywheel-Only
This is a complete flywheel and clutch package. It is the better choice if your clutch is worn, your pressure plate is worn or unknown, or you want the flywheel and clutch components matched together from the start.
A flywheel-only setup may be appropriate only if your car already has a compatible clutch and pressure plate configuration in good condition and you are specifically replacing only the flywheel. If you are unsure, contact us before ordering so we can help verify the correct AASCO option for your car.
Good Candidates for This Complete Kit
This complete kit is generally intended for:
2020–2023 Porsche 718 Cayman GT4 4.0 manual applications
2020–2023 Porsche 718 Spyder 4.0 manual applications
2021–2025 Porsche 718 Cayman GTS 4.0 manual applications
2021–2025 Porsche 718 Boxster GTS 4.0 manual applications
Cars with a worn clutch, worn pressure plate, or unknown clutch service history
Cars converting from the factory dual-mass flywheel setup to an AASCO lightweight steel flywheel and Sachs Sport clutch setup
Drivers who want everything matched together as a complete AASCO / Sachs package
This kit is not intended for the 718 Cayman GT4 RS or 718 Spyder RS because those models are PDK-only.
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.
Installation Notes
AASCO notes that the larger portion of the clutch disc spring carrier must face toward the flywheel. If the clutch disc is installed backwards, the clutch diaphragm spring may contact the clutch disc, which can result in clutch failure and may not be covered under warranty.
Professional installation is recommended. However, there are DIY how-to guides linked below if you have the tools and equipment at home.
Important Notes
This listing is for the complete AASCO lightweight steel flywheel and Sachs Sport clutch package listed under part number 106435-12-PKG. The flywheel included in this kit is AASCO part number 106447-12.
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 12 in
Shipping weight: 34 lb
Part Number: 106435-12-PKG
Brand: AASCO Motorsports
Upgrade your manual Porsche 718 Cayman GT4, 718 Spyder, or 718 GTS 4.0 with a complete AASCO lightweight steel flywheel and Sachs Sport clutch package designed to reduce rotating mass, dramatically improve engine response, and refresh the clutch system at the same time. This kit pairs the AASCO 106447-12 lightweight steel DFI flywheel with compatible Sachs Sport clutch components for select Porsche 718 4.0L manual applications.
Compared to the factory dual-mass flywheel setup, this AASCO lightweight flywheel removes a substantial amount of rotating mass. On the 718 4.0L platform, the factory flywheel weighs approximately 28.5 lb, meaning this 14 lb AASCO flywheel removes approximately 14.5 lb of rotating mass. The result is a sharper, more responsive engine that revs more freely, responds more directly, 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 718 Cayman GT4, 718 Spyder, or 718 GTS 4.0 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 complete kit is a great choice for drivers looking for a more responsive, motorsport-inspired feel from their manual 718 4.0L while also replacing the clutch, pressure plate, release bearing, and related hardware with a matched Sachs Sport clutch package. The AASCO flywheel is a lightweight steel design, which can be a nice balance for street-driven cars that want sharper response without moving to an ultra-aggressive race-style clutch setup.
Fitment
Fits select manual transmission Porsche 718 4.0L models:
2020–2023 Porsche 718 Cayman GT4 4.0
2020–2023 Porsche 718 Spyder 4.0
2021–2025 Porsche 718 Cayman GTS 4.0
2021–2025 Porsche 718 Boxster GTS 4.0
This kit is intended for select manual transmission Porsche 718 4.0L applications using the included AASCO lightweight steel flywheel and Sachs Sport clutch package.
This kit is not intended for non-718 4.0L applications unless specifically confirmed.
Product Details
Complete AASCO lightweight steel flywheel and Sachs Sport clutch kit
Part number: 106435-12-PKG
Includes AASCO lightweight steel DFI flywheel: 106447-12
Includes Sachs Sport pressure plate: 883082999754
Includes Sachs clutch disc: 881861000017
Includes release bearing and required installation hardware
Designed for select Porsche 718 4.0L manual applications
Compatible with select 718 Cayman GT4, 718 Spyder, 718 Cayman GTS 4.0, and 718 Boxster GTS 4.0 manual applications
Flywheel weight: approximately 14 lb
Factory 718 4.0L flywheel weight: approximately 28.5 lb
Approximate rotational mass savings on 718 4.0L applications: 14.5 lb
Lightweight steel construction
Reduces rotating engine mass compared to the factory dual-mass flywheel setup
Helps the engine rev faster
Improves throttle response and rev-matching feel
Matched flywheel and Sachs Sport clutch package
Complete kit 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 significantly 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 lightweight flywheel and clutch options across the Boxster, Cayman, Carrera, Turbo, and GT platforms. The correct choice depends on your chassis, engine, transmission, and clutch package.
This listing is for the AASCO 106435-12-PKG complete kit. It is the right choice if you want the AASCO 106447-12 lightweight steel DFI flywheel, Sachs Sport pressure plate, Sachs clutch disc, release bearing, and installation hardware together as a matched package for your compatible 718 4.0L manual.
Complete Kit vs. Flywheel-Only
This is a complete flywheel and clutch package. It is the better choice if your clutch is worn, your pressure plate is worn or unknown, or you want the flywheel and clutch components matched together from the start.
A flywheel-only setup may be appropriate only if your car already has a compatible clutch and pressure plate configuration in good condition and you are specifically replacing only the flywheel. If you are unsure, contact us before ordering so we can help verify the correct AASCO option for your car.
Good Candidates for This Complete Kit
This complete kit is generally intended for:
2020–2023 Porsche 718 Cayman GT4 4.0 manual applications
2020–2023 Porsche 718 Spyder 4.0 manual applications
2021–2025 Porsche 718 Cayman GTS 4.0 manual applications
2021–2025 Porsche 718 Boxster GTS 4.0 manual applications
Cars with a worn clutch, worn pressure plate, or unknown clutch service history
Cars converting from the factory dual-mass flywheel setup to an AASCO lightweight steel flywheel and Sachs Sport clutch setup
Drivers who want everything matched together as a complete AASCO / Sachs package
This kit is not intended for the 718 Cayman GT4 RS or 718 Spyder RS because those models are PDK-only.
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.
Installation Notes
AASCO notes that the larger portion of the clutch disc spring carrier must face toward the flywheel. If the clutch disc is installed backwards, the clutch diaphragm spring may contact the clutch disc, which can result in clutch failure and may not be covered under warranty.
Professional installation is recommended. However, there are DIY how-to guides linked below if you have the tools and equipment at home.
Important Notes
This listing is for the complete AASCO lightweight steel flywheel and Sachs Sport clutch package listed under part number 106435-12-PKG. The flywheel included in this kit is AASCO part number 106447-12.
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 12 in
Shipping weight: 34 lb