Which cars does the Lightweight Flywheel for BE5 fit?

Cusco USA lists part number 660 023 A for the Subaru Legacy (BE5, BD5, 1995-2004) and the Subaru Legacy Outback (BG5, 1995-1999). The Lightweight Flywheel for BE5 replaces the factory flywheel, so the transmission has to come out to fit it.

Will a lighter flywheel make the car faster?

It makes the engine change speed more quickly, which sharpens throttle response and helps acceleration in the lower gears, where rotating inertia matters most. It does not add horsepower. The gain is most noticeable on track and on downshifts, and it pairs well with a performance clutch fitted at the same time.

Is it good for daily driving?

Yes, with some changes in feel. Idle can be slightly less smooth, pulling away from a stop needs a little more care with the clutch, and some drivetrain noise at idle may be more noticeable. Most owners adapt quickly, but a car that spends most of its life in stop-and-go traffic gains little from it.

Should I replace the clutch at the same time?

It is the obvious time to do it, because both parts are behind the transmission. A fresh clutch disc and cover bed in best against a new flywheel surface, so it makes sense to fit a fresh clutch if the old one is part worn. At minimum, fit a new release bearing while everything is apart.

What should be checked during installation?

Fit the flywheel with new bolts torqued to the factory figure, following the factory procedure for thread locker, and check the clutch disc and release bearing while everything is apart. Any vibration after installation should be checked by the installer before the car is driven hard.

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Description

Cusco Lightweight Flywheel for BE5 / BD5 Subaru Legacy and BG5 Subaru Legacy Outback

Cusco’s Lightweight Flywheel for BE5 / BD5 Subaru Legacy and BG5 Subaru Legacy Outback replaces the factory flywheel with a lighter one, weighing 4.6 kg according to Cusco. With less rotating mass to spin up and slow down, the engine revs more freely, blips for downshifts land faster and the car pulls through the gears with less inertia to overcome. It suits a car that is driven hard on track or canyon roads, where throttle response matters more than idle smoothness.

Design and Performance

A flywheel stores energy, which smooths idle and makes pulling away easy, but that same inertia slows how fast the engine can change speed. The Lightweight Flywheel for BE5 trades some of that stored energy for response. Expect idle to feel a little less settled and pulling away on a hill to need a touch more care; in return, the engine gains and sheds revs more quickly, which shows most clearly on rev-matched downshifts and in the lower gears. Cusco makes it from chrome molybdenum steel.

Features

Lightweight design for quicker engine response
Weight 4.6 kg, per Cusco
Chrome molybdenum steel
Replaces the factory flywheel
Suited to track and spirited road use
Pairs with a performance clutch

Specifications

Cusco part number: 660 023 A
Type: Lightweight flywheel
Weight: 4.6 kg
Material: Chrome molybdenum steel
Position: Between engine and clutch
Fitting: Replaces the factory flywheel

Applications

Subaru Legacy: BE5 | 2000-2004 | AWD 2.0L Turbo (EJ20T)
Subaru Legacy: BD5 | 1995-1999 | AWD 2.0L Turbo (EJ20T)
Subaru Legacy Outback: BG5 | 1995-1999 | EJ20T

Notes

Installation labor is not included; the transmission must come out to fit it

Frequently Asked Questions

Which cars does the Lightweight Flywheel for BE5 fit? Cusco USA lists part number 660 023 A for the Subaru Legacy (BE5, BD5, 1995-2004) and the Subaru Legacy Outback (BG5, 1995-1999). The Lightweight Flywheel for BE5 replaces the factory flywheel, so the transmission has to come out to fit it.
Will a lighter flywheel make the car faster? It makes the engine change speed more quickly, which sharpens throttle response and helps acceleration in the lower gears, where rotating inertia matters most. It does not add horsepower. The gain is most noticeable on track and on downshifts, and it pairs well with a performance clutch fitted at the same time.
Is it good for daily driving? Yes, with some changes in feel. Idle can be slightly less smooth, pulling away from a stop needs a little more care with the clutch, and some drivetrain noise at idle may be more noticeable. Most owners adapt quickly, but a car that spends most of its life in stop-and-go traffic gains little from it.
Should I replace the clutch at the same time? It is the obvious time to do it, because both parts are behind the transmission. A fresh clutch disc and cover bed in best against a new flywheel surface, so it makes sense to fit a fresh clutch if the old one is part worn. At minimum, fit a new release bearing while everything is apart.
What should be checked during installation? Fit the flywheel with new bolts torqued to the factory figure, following the factory procedure for thread locker, and check the clutch disc and release bearing while everything is apart. Any vibration after installation should be checked by the installer before the car is driven hard.

About CUSCO

CUSCO is the brand of Carrosser Co., Ltd., founded in December 1977 and based in Takasaki, Gunma Prefecture, Japan. Carrosser designs and builds coilovers, limited-slip differentials, clutches, roll cages and chassis parts, sells its steel cages under the Safety 21 name, and competes in every All Japan Championship category from circuit racing to rally and gymkhana. CUSCO USA, a division of Carrosser, is based in Huntington Beach, California.

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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Cusco Lightweight Flywheel for BE5 / BD5 Subaru Legacy and BG5 Subaru Legacy Outback [660 023 A]

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Cusco Lightweight Flywheel for BE5 / BD5 Subaru Legacy and BG5 Subaru Legacy Outback

Design and Performance

Features

Specifications

Applications

Notes

Frequently Asked Questions

About CUSCO

Reviews