ACT 1999 Acura Integra MaXX/Race Sprung 6 Pad Clutch Kit

The ACT AI4-XXG6 is the heaviest-clamping single-disc kit ACT builds for the B-series Honda and Acura 5-speed: a MaXX Xtreme pressure plate paired with a 6-pad, spring-centered ceramic race disc. It is the kit people look for when a 1999 Acura Integra GS-R or a turbo B18 build starts slipping in third and fourth under boost and a heavy-duty street clutch has already given up. It is not a comfort upgrade for a daily driver, and this page explains why before you buy.

What the MaXX race clutch does in a B-series Integra

A stock Integra clutch clamps a full-face organic disc just hard enough for factory power. ACT rates the AI4-XXG6 at 485 ft-lb at the crank, 162 percent over OE, which is far beyond what any naturally aspirated B18 makes. That headroom is the point: forced induction, nitrous, sticky tires and drag launches all spike torque well above the engine's dyno number. The MaXX diaphragm raises clamp load, and the six ceramic pads tolerate heat that would glaze an organic facing. The sprung hub still damps driveline vibration, which helps the 220 mm (8.7 in) disc survive repeated hard launches.

The trade-off is feel. ACT describes heavy to very heavy pedal effort, aggressive engagement and mild to moderate gear rattle. Expect it to grab like an on-off switch in parking lots.

Symptoms that point to this kit

• RPM climbs without road speed in higher gears under full throttle or boost
• A heavy-duty or organic street clutch that slipped or glazed within a few thousand miles of a power upgrade
• Burning smell after launches or track sessions
• Chatter on takeoff from a disc with hot spots
• Release bearing noise when the pedal is pressed (this kit includes a new bearing)

How to confirm the clutch is the problem

Before spending race-clutch money, rule out the release side. On the cable-operated Integra, a cable adjusted with too little free play holds the bearing against the diaphragm fingers and will make any clutch slip; on hydraulic-release chassis, a slave cylinder that will not fully return does the same. Our slipping diagnosis guide walks through separating a slipping clutch from other driveline faults, and clutch slipping causes covers the manual-specific checks. Also look for oil on the disc from a leaking rear main or input shaft seal, since new friction will be ruined the same way.

Fitment

Our listing is titled for the 1999 Integra, but ACT's own application chart for AI4-XXG6 is broader: 1994-2001 Acura Integra 1.8L (B18B1, B18C1, B18C5) 5-speed, 1994-1997 Honda Civic Del Sol 1.6L VTEC DOHC B-series, 1999-2000 Civic Si, and 1998-2001 Honda CR-V EX and LX 2.0L. D-series Civics and K-series cars use different kits. If the car has had an engine or transmission swap, match the transmission rather than the chassis, and send us the year and VIN or the build details so we can confirm before it ships. Compare other options in our clutch and rebuild kit collection; if your power is lower, the ACT XT race sprung 6-pad kit or the HD race sprung 6-pad kit gives a lighter pedal for the same car.

What is in the box

• H025XX MaXX Xtreme pressure plate
• 6220110 6-pad sprung race disc
• RB817 release bearing and PB1002 pilot bearing
• AT88 alignment tool

No flywheel is included. ACT sells matching XACT flywheels (600105 Prolite and 600110 Streetlite) separately.

Install notes

• Resurface or replace the flywheel. A ceramic puck disc on a glazed or heat-checked surface will chatter badly. A steel option such as the Competition Clutch 12.32 lb Integra steel flywheel is a common pairing; see resurface vs replace.
• Pull the old pilot bearing and install the supplied PB1002; a slide-hammer pilot bearing puller makes this a quick job.
• Center the disc with the AT88 tool and torque the pressure plate bolts evenly in a star pattern.
• Inspect the release fork and pivot, then set clutch cable free play (or bleed the hydraulics on hydraulic-release models). The heavier MaXX diaphragm loads the cable and fork harder than stock.
• Break-in: ACT says race discs usually need only a few hard slips to lap the surfaces in, without overheating them. Our clutch break-in guide covers the process.

Will the AI4-XXG6 fit my 1997 Integra GS-R even though the listing says 1999?

ACT lists the kit for 1994-2001 Integra 1.8L B18B1, B18C1 and B18C5 5-speeds, so a 1997 GS-R is on the chart. Send us your VIN if the car has a swapped transmission.

Is this kit good for a daily driver?

Only if you accept a heavy pedal and abrupt engagement. ACT rates it heavy to very heavy pedal effort with mild to moderate gear rattle and recommends it for high-horsepower street or race use.

How much torque does it hold?

ACT rates the AI4-XXG6 at 485 ft-lb measured at the crank, 162 percent over the factory clutch.

Does it come with a flywheel?

No. The kit includes the pressure plate, 6-pad disc, release bearing, pilot bearing and alignment tool. Resurface your flywheel or buy a new one.

How do I break in a 6-pad race disc?

ACT says race discs usually only need a few hard slips to lap in the surfaces. Avoid overheating it, which can glaze or fuse the friction faces.

• How to Diagnose Transmission Slipping
• Automatic vs. Manual Transmission Repair Cost
• Shift Flare vs. Slip: How to Tell Them Apart