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Lightweight Flywheel for '84-'91 E30 325i/is/iX and E34 525i/M20 - M5 sprung-hub clutch conversion

Convert your E30 325i/iS/iX or E34 525i with M20 motor to the larger high-capacity M5 clutch. *SEE STARTER NOTES*

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Price: $1,358.90

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SKU: B1-A-PO

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Summary

Stage 2 flywheel - M5 clutch conversion for all M20 "i" engined models.

Requires use of 12 41 2 354 709/Bosch SR-0445-X Starter

Available for these models:

1985-1992 E30 325i, 323i, 320i
1988-1991 E30 325iX
1989-1991 E34 525i, 520i (models with M20 engine)
1985-1988 E28 520i
1988-1991 Z1

Ultimate throttle response and faster acceleration at your command!

National-level race winners use the UUC Stage2/M5 clutch combo.

UUC's exclusive-design "sprung hub" clutch design Stage II lightweight flywheel has been named one of European Car magazine's "Top 10 Products"

This package uses our 8.5lb flywheel platform with the correct ring gear for the E30 325i (and other models using the M20 i-series engine), and the complete clutch kit from the E34 M5 3.6l.

Even though the flywheel weight is only 8.5lbs, the heavier E34 M5 clutch package gives the overall performance gain of a conventional E30 lightweight flywheel of around 12lbs with E30 clutch.

Why is this a big deal for the E30 community? Direct access to the larger clutch disk size of the E34 M5 (240mm) and greater clamping force of the superior E34 M5 pressure plate for high-powered modified cars and for greater longevity than the smaller original cluth. Even when using a standard OE-replacement E34 M5 clutch, it's the equivalent of a performance E30 clutch... the E34 M5 system was originally designed for a 315hp motor in a chassis weighing several hundred pounds more than the E30.

The lighter weight flywheel gives a very noticeable increase in acceleration, particularly in the lower gears. Rev-matching and heel-toe shifting are also much easier.

This package is ideal for heavy-use enthusiast cars, either for street or track use. For extreme-power turbo cars, UUC offers even higher-performance versions of the E34 M5 clutch system in our Performance Organic, Kevlar, and Cerametallic facings.

Our E30 Stage 2/E34 M5 clutch conversion package is a direct bolt-in to the standard 325 transmission. No modifications required, standard starter and clutch slave cylinder are retained. Pedal effort and engagement style is virtually identical to the standard E30 clutch.

This clutch has several advantages for the enthusiast driver:

Maintaining the reliability and over-the-counter availability of a BMW factory part.
Greater clamping force than standard 3-series clutch.
Incorporates a sprung-hub design to minimize gear rattle, includes heavy-duty steel pressure plate.

The advantage of a sprung-hub clutch design is improved resistance (and in many cases, complete elimination) of the residual chattering noise at idle that some lightweight flywheel-equipped cars can experience.

Because BMW specced this clutch for use on the powerful S38-series engine in the M5, it is easily up to the task of handling the output from a modified M20-series motor (all '84-'91 6-cylinder E30 modelsand early E34 525i, and Z1).

UUC customers have been using the Stage 2 & M5 clutch setup in turbo or supercharged M3s and MZ3s with fantastic results. Our own testing has shown the M5 clutch to reliably handle in excess of 450hp.

The UUC Stage 2 flywheel and clutch assembly has been used in the "test platform" E36 M3 of Eurosport High Performance's supercharger development, reliably handling many miles and dyno runs in this powerful machine. UUC also provides many US and European turbo and supercharger tuners with the Stage2 setup.

You can be assured not only of the performance increase you will experience, but the long-term ease of ownership that comes with knowing a replacement clutch is never any further away than your dealer's parts counter.

Now available - complete Stage 2 flywheel and clutch kits with choice of these clutch components:

- OEM BMW M5 clutch kit (organic)
- UUC Performance Organic (performance street/track organic)
- UUC Segmented Kevlar (high power turbo/surpercharged street/track use)

Please call UUC to discuss your clutch requirements.

All kits come complete with Stage 2 flywheel, pressure plate, clutch disk, throwout (release) bearing, crankshaft bolts, gall plate, and loc-tite.

applications:

325, 323, 320 (all iS/i/e/eS variants, 1984-1991 E30 6-cylinder models)
525i (1990-1991 E34 with M20 engine)
Z1
models with manual transmission only.

technical details:

construction: CNC machined 6061-T6 aluminum
dowel pin hole: enlarged like factory-fit.
friction plate: replaceable, 1050 steel (suitable for any clutch material).
balancing: 11,000rpm and spin-burst tested to 14,000rpm. SFI CERTIFIED
weight: 8.5 lb
pressure plate, throwout bearing & clutch used: '91 - '93 E34 M5

VERY IMPORTANT: some parts vendors have been supplying the wrong clutch components. We strongly recommend sourcing the entire flywheel and clutch from UUC to guarantee you get the correct parts.

Source: Made in USA

Professional installation recommended.

© 2002-2012 UUC Motorwerks

CUSTOMER REVIEWS (1)

Average Rating: (From 1 Review):

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Blemished m5 flywheel and clutch for my 325ix
From Anonymous of Hamburg, New York on 11/19/2017.

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Product Details

Options	SKU	Price
OPTIONS: Stage 2 flywheel only; Add Starter? +$199.50: 12 41 2 354 709/Bosch SR0445X	B1	$706.09
OPTIONS: + Performance Organic clutch; Add Starter? +$199.50: 12 41 2 354 709/Bosch SR0445X	B1-A-PO	$1,358.90
OPTIONS: + genuine BMW M5 clutch; Add Starter? +$199.50: 12 41 2 354 709/Bosch SR0445X	B1-A-OE	$1,233.98
OPTIONS: + Segmented Kevlar; Add Starter? +$199.50: 12 41 2 354 709/Bosch SR0445X	B1-A-SK	$1,595.37
OPTIONS: + MultiPuck Ceramic clutch; Add Starter? +$199.50: 12 41 2 354 709/Bosch SR0445X	B1-A-MP	$1,536.52

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