CMPRO Stage 2 Clutch Specifications

Vehicle Applications

According to the supplied CMPRO fitment information, this clutch kit is intended for select:

Important Celica ST Fitment Discrepancy

The supplied product copy contains conflicting Celica ST information.

One section states:

6/1991–1997 Toyota Celica ST

while another states:

6/1991–1993 Toyota Celica ST.

Because those ranges do not agree, buyers should verify the exact year, engine and transmission before ordering this clutch for a Celica ST.

Do not assume the broader 1991–1997 range is correct without application confirmation.

Designed for 1ZZ-FE and 2ZZ-GE Applications

A particularly useful part of this clutch’s application range is its compatibility with several Toyota 1ZZ-FE and 2ZZ-GE vehicles.

The supplied fitment includes:

1ZZ-FE Applications

• Toyota Celica GT
• Toyota Matrix
• Toyota MR2 Spyder
• Pontiac Vibe

2ZZ-GE Applications

• Toyota Celica GT-S
• Toyota Corolla XRS
• Toyota Matrix XRS
• Pontiac Vibe GT

These engines share some Toyota drivetrain architecture, but that does not mean every 1ZZ or 2ZZ transmission combination automatically uses the same clutch.

Always verify the transmission and spline specification.

CMPRO Stage 2 Carbon/Kevlar Clutch Disc

The centerpiece of the kit is its:

carbon/Kevlar-infused Stage 2 clutch disc.

CMPRO positions this friction material above a basic stock-replacement clutch for applications that need additional torque capacity.

The advertised rating of:

240 lb-ft

makes this kit potentially relevant for:

• Naturally aspirated performance builds
• Intake/header/exhaust combinations
• ECU tuning
• Camshaft upgrades
• Mild forced-induction builds within rating
• Street/track cars

Clutch selection should always be based primarily on expected torque rather than modification labels.

264 HP / 240 LB-FT Rating

CMPRO advertises the kit at:

264 horsepower

and:

240 lb-ft of torque.

The torque figure deserves more attention than the horsepower number.

A clutch transfers torque through the drivetrain.

A car producing substantial low- or mid-range torque can challenge a clutch even if its peak horsepower appears modest.

Compare the engine’s expected torque against the clutch’s advertised capacity and intended use.

Why Torque Capacity Matters More Than Horsepower

Horsepower makes the headline.

Torque determines how hard the clutch has to hold.

Clutch demand is affected by:

• Peak engine torque
• Tire grip
• Vehicle weight
• Launch technique
• Track use
• Forced induction
• Gear ratios
• Driving style

A mildly tuned daily driver has very different clutch requirements from a sticky-tire drag car making the same dyno horsepower.

8-1/4-Inch Clutch Disc

The supplied disc measures:

8-1/4 inches in diameter.

The hub specification is:

15/16″ × 21 spline.

These dimensions are critical fitment data.

The clutch must match the transmission input shaft.

A similar-looking Toyota clutch is not automatically interchangeable if the hub diameter or spline count differs.

21-Spline Hub

This CMPRO kit uses a:

21-spline clutch disc hub.

That is especially important on cars with:

• Transmission swaps
• Engine swaps
• Previous clutch conversions
• Unknown drivetrain history

Verify the transmission instead of relying only on the engine code.

For example:

“I have a 2ZZ swap”

does not, by itself, prove which clutch is required.

Toyota Celica GT Fitment

The supplied listing identifies:

2000–2005 Toyota Celica GT with 1.8L 1ZZ-FE and 5-speed manual transmission.

This is one of the clearest application groups in the listing.

Drivers with modified cars should still verify the transmission has not been swapped.

Toyota Celica GT-S Fitment

CMPRO also lists:

2000–2005 Toyota Celica GT-S with 1.8L 2ZZ-GE and 6-speed manual transmission.

The GT-S used a different performance-oriented drivetrain than the base GT.

Do not assume all seventh-generation Celica clutch parts are interchangeable simply because both cars use 1.8L engines.

Toyota Corolla Fitment

The supplied application data includes:

1993–2008 Toyota Corolla with 1.6L or 1.8L manual-transmission applications.

That is a broad year range covering several Corolla generations.

Exact fitment should therefore be confirmed by:

• Model year
• Engine
• Transmission
• Input spline

before ordering.

Toyota Corolla XRS Fitment

CMPRO specifically lists:

2005–2006 Toyota Corolla XRS with 1.8L 2ZZ-GE and 6-speed transmission.

The XRS is mechanically different from many standard Corolla applications.

Its 2ZZ-GE engine and 6-speed transmission make it particularly important to verify the exact clutch application rather than ordering by Corolla model name alone.

Toyota Matrix Fitment

The supplied listing includes:

2003–2008 Toyota Matrix with 1.8L 1ZZ-FE and 5-speed manual.

This corresponds to the standard naturally aspirated Matrix drivetrain listed by CMPRO.

Toyota Matrix XRS Fitment

For the higher-performance model, the listing identifies:

2003–2008 Toyota Matrix XRS with 1.8L 2ZZ-GE and 6-speed manual.

As with the Corolla XRS and Celica GT-S, the 2ZZ/6-speed combination should be treated as its own drivetrain application.

Pontiac Vibe Fitment

The Pontiac Vibe shares substantial mechanical architecture with the Toyota Matrix.

CMPRO lists:

2003–2008 Pontiac Vibe with 1.8L 1ZZ-FE and 5-speed manual transmission.

That shared Toyota drivetrain architecture is why many clutch components cross over between Matrix and Vibe applications.

Pontiac Vibe GT Fitment

CMPRO also includes:

2003–2008 Pontiac Vibe GT with 1.8L 2ZZ-GE and 6-speed manual transmission.

The Vibe GT is the performance-oriented counterpart to the Matrix XRS.

Again, engine and transmission configuration matter more than the badge.

Toyota MR2 Spyder Fitment

The supplied application data lists:

2000–2006 Toyota MR2 Spyder with 1.8L 1ZZ-FE and 5-speed manual transmission.

Because the MR2 Spyder is a mid-engine platform, its drivetrain layout differs substantially from front-engine Corolla and Matrix models.

Shared engine family does not mean every surrounding drivetrain component is identical.

Verify the exact transmission application.

Chevrolet Prizm Fitment

CMPRO lists:

1998–2002 Chevrolet Prizm with 1.8L DOHC and 5-speed manual transmission.

The Prizm was closely related mechanically to the Toyota Corolla, which explains the crossover in clutch applications.

Exact transmission fitment should still be confirmed.

Geo Prizm Fitment

The supplied listing includes:

1990–1997 Geo Prizm 1.6L

and:

1993–1997 Geo Prizm 1.8L

manual-transmission applications.

These older vehicles are now especially likely to have replacement transmissions or drivetrain modifications, making physical verification worthwhile.

What Comes in the Kit?

According to the supplied CMPRO product information, this package includes:

• Performance HD pressure plate
• Stage 2 carbon/Kevlar-infused clutch disc
• Release bearing
• Pilot bearing
• Alignment tool
• Installation guide

This provides the primary clutch-service components needed for replacement.

Performance HD Pressure Plate

The kit includes a:

Performance HD pressure plate.

The pressure plate provides the clamping force that holds the clutch disc against the flywheel.

Increasing clamp capacity can help the clutch hold more torque.

However, a stronger performance pressure plate may also affect:

• Pedal effort
• Engagement feel
• Low-speed drivability

compared with a stock replacement.

Is Stage 2 Good for Daily Driving?

CMPRO specifically markets this kit for:

• Daily driving
• Performance street use
• Moderate track use

That is the appeal of many Stage 2 clutch packages.

They aim to provide more holding capacity than an OEM replacement without moving all the way into an aggressive race clutch.

Actual engagement behavior will depend on the vehicle, hydraulic system, flywheel and clutch setup.

What Does Stage 2 Mean?

There is no universal automotive standard defining:

Stage 2 clutch.

Different manufacturers use the term differently.

The useful specifications here are:

• Carbon/Kevlar friction material
• 240 lb-ft advertised torque capacity
• 8-1/4-inch disc
• 21-spline hub
• Performance HD pressure plate

Those numbers matter more than the Stage 2 label alone.

Is This Good for a 2ZZ-GE Build?

Potentially.

The supplied fitment includes multiple factory 2ZZ-GE applications such as:

• Celica GT-S
• Corolla XRS
• Matrix XRS
• Vibe GT

For a modified 2ZZ, compare the expected torque output with CMPRO’s advertised:

240 lb-ft capacity.

This is especially important for supercharged or turbocharged builds.

Is This Good for a 1ZZ-FE Turbo Build?

Possibly, but only if expected torque remains within the kit’s capabilities and CMPRO approves the application.

A turbocharged 1ZZ can exceed stock torque substantially depending on:

• Turbo size
• Boost pressure
• Fuel
• ECU calibration
• Engine internals

Do not choose the clutch based only on horsepower.

Naturally Aspirated Performance Builds

This clutch may be particularly attractive to naturally aspirated vehicles using modifications such as:

• Intake
• Header
• Exhaust
• ECU tune
• Camshafts
• Cylinder-head work
• Higher compression

These modifications can increase clutch demand without necessarily requiring a harsh competition clutch.

Inspect the Flywheel

Before installing a new clutch, inspect the flywheel for:

• Heat spots
• Scoring
• Cracks
• Glazing
• Grooves
• Excessive wear

The flywheel should be resurfaced or replaced according to the appropriate service specifications and clutch manufacturer’s requirements.

A new performance clutch deserves a proper friction surface.

Check the Rear Main Seal

With the transmission removed, inspect the rear of the engine for oil leakage.

Oil contamination on the clutch disc can cause:

• Slipping
• Chatter
• Burning odor
• Premature failure

Repair active leaks before installing the clutch.

Inspect the Transmission Input Seal

Transmission oil can create similar problems.

Check the input shaft and bellhousing for signs of leakage before reassembly.

Release Bearing Included

The package includes a new:

release bearing.

Because transmission removal is required for clutch service, replacing the old release bearing during the job is generally preferable to reusing one with unknown mileage.

Pilot Bearing Included

CMPRO also lists a:

pilot bearing

as part of the package.

Use the supplied component only where applicable to the exact drivetrain and follow the correct Toyota/GM service procedure.

Use the Alignment Tool

The clutch disc must be centered correctly during assembly.

Use the supplied alignment tool before tightening the pressure plate.

Poor alignment can prevent the transmission input shaft from sliding into place.

Pressure Plate Installation

Install pressure-plate bolts:

• Evenly
• Gradually
• In the correct sequence
• To the specified torque

Do not fully tighten one bolt while the remaining bolts are still loose.

Use factory service specifications for the exact drivetrain.

Keep Friction Surfaces Clean

Do not contaminate the clutch disc or flywheel with:

• Engine oil
• Transmission fluid
• Grease
• Dirty hands
• Penetrating lubricant

The entire clutch system depends on friction.

Greasing the friction surface is one modification with an impressively consistent 100% failure rate.

Clutch Break-In

Follow CMPRO’s current break-in procedure after installation.

A new performance clutch generally requires normal engagement cycles before aggressive use.

Avoid immediately performing:

• Hard launches
• Clutch dumps
• Drag starts
• Repeated high-load slips

unless specifically permitted by the manufacturer.

Symptoms of a Worn Clutch

Common signs include:

• RPM rises without matching acceleration
• Slipping at higher loads
• Burning clutch smell
• High engagement point
• Chatter during takeoff
• Poor acceleration

Always diagnose the problem before replacing components.

Clutch or Hydraulic Problem?

Hard shifting does not automatically mean the clutch disc is worn.

Other possible causes include:

• Clutch master cylinder
• Slave cylinder
• Hydraulic leaks
• Air in the system
• Release mechanism wear
• Transmission synchronizer problems

Diagnosis can save a lot of unnecessary parts swapping.

Who Should Consider This Kit?

The CMPRO Stage 2 kit is most relevant to compatible manual-transmission:

• Toyota Celica GT
• Toyota Celica GT-S
• Toyota Corolla
• Toyota Corolla XRS
• Toyota Matrix
• Toyota Matrix XRS
• Toyota MR2 Spyder
• Pontiac Vibe
• Pontiac Vibe GT
• Chevrolet Prizm
• Geo Prizm

owners looking for increased clutch capacity without going directly to a competition-only setup.

Who Should Verify Further Before Ordering?

Additional verification is especially important if:

• The transmission has been swapped
• The engine has been swapped
• The car has a 1ZZ/2ZZ conversion
• The vehicle falls within the disputed Celica ST range
• The car has an aftermarket flywheel
• The drivetrain history is unknown

Older Toyota platforms are popular swap candidates.

Verify what is physically installed.

Warranty

ClutchMaxPRO advertises a limited manufacturer warranty of:

12 months or 15,000 miles.

Coverage may depend on:

• Correct application
• Proper installation
• Vehicle use
• Product condition
• Proof of purchase
• Manufacturer exclusions

Review the current warranty terms before installation.

Fitment Checklist

Before ordering this clutch, verify:

Year → Make → Model → Engine → Transmission → Speed Count → 21-Spline Input → Flywheel

For 1ZZ and 2ZZ applications, pay particular attention to whether the vehicle uses the listed:

5-speed or 6-speed transmission.

Final Take

The CMPRO Stage 2 clutch kit for Toyota-based 1.6L and 1.8L applications is designed for enthusiasts who want more clutch capacity than a standard replacement while retaining street usability.

Its key specifications include:

264 HP advertised capacity

240 lb-ft advertised torque capacity

8-1/4″ carbon/Kevlar-infused clutch disc

15/16″ × 21-spline hub

and:

Performance HD pressure plate.

The broad application list includes some of Toyota’s most popular compact performance platforms, especially the:

1ZZ-FE and 2ZZ-GE

Celica, Corolla, Matrix, Vibe and MR2 families.

As always, fitment comes first.

Verify the transmission, spline count and flywheel before ordering, and pay special attention to the conflicting Celica ST year range in the supplied catalog data.