Competition Clutch Ultra Lightweight Flywheel for B Series

Competition Clutch Ultra Lightweight Flywheel - 1990-2001 Acura Integra

Building a turbo B series and want your Integra to rev faster? The Competition Clutch ultra lightweight flywheel weighs 8.58 pounds, which is way lighter than your factory flywheel. When you cut that much rotational weight, your engine revs up and down way faster. You'll notice it instantly when you blip the throttle or shift gears. The flywheel's made from 4140 forged steel in a one-piece design, so you're not dealing with ring gear separation or warped friction surfaces like you get with cheap two-piece flywheels. This is the STU version, which means it's Competition Clutch's ultra lightweight flywheel for turbo builds, track use, and Stage 3+ clutches.

Here's Why Your Engine Revs Faster

Your factory flywheel's heavy because Honda wanted smooth, easy drivability when you're sitting in traffic. That extra weight stores rotational energy and smooths out power delivery between engine strokes. When you want your engine to rev faster, you need less rotational mass spinning. That's what this lightweight flywheel does. It cuts almost half the weight off your flywheel, so your engine revs up and down way quicker. That's huge when you're racing and you're constantly shifting and you need instant throttle response. The downside? You lose some low-end drivability. Your engine won't lug at low RPM like it used to, and you'll need to rev it more to get moving smoothly in traffic.

8.58 Pounds vs Your Factory Flywheel

This flywheel weighs 8.58 pounds. Your factory B series flywheel weighs somewhere around 14-16 pounds depending on which Integra you've got. You're cutting almost half the weight. That means your engine revs faster, but it also means you've got less rotational inertia to smooth things out at low RPM. If you're building a turbo car or a track car where you're constantly on the throttle and shifting, the lightweight flywheel's worth the tradeoff. If you're daily driving your Integra in stop-and-go traffic, you might find the lightweight flywheel annoying because your engine doesn't have as much momentum to keep it smooth when you're crawling along at 1500 RPM.

One-Piece Forged Steel So It Won't Fall Apart

Competition Clutch machines this flywheel from 4140 forged steel in a one-piece design. The ring gear's machined directly into the flywheel body instead of being pressed on separately. That means you're not going to have the ring gear separate from the flywheel, which is what happens with cheap two-piece flywheels when they heat cycle. The one-piece design also prevents your friction surface from warping because there's no separate friction ring that can shift or warp on its own.

You Can Resurface It When It Wears

When your flywheel gets heat-checked or worn, you can have it resurfaced at a machine shop. You're not throwing it away and buying a new one every time you do a clutch job. It's also SFI certified, which matters if you're racing in classes that require SFI-certified components.

Designed for Stage 3+ Clutches

This STU ultra lightweight flywheel's designed to work with Competition Clutch Stage 3 and higher clutches. It'll work with stock clutches and other performance clutches too, but it's really meant for high-performance setups where you're running a stiff clutch and you want maximum throttle response. If you're running a stock clutch or a Stage 1 or 2 clutch and you're daily driving, Competition Clutch makes a heavier ST version that's easier to live with.

What You Get

• Competition Clutch ultra lightweight flywheel (STU version)
• 4140 forged steel one-piece construction
• 8.58 pounds
• SFI certified
• Resurfaceable friction surface
• Alignment tool included (if applicable)
• 90-day warranty

Fits Your Car

• 1990-2001 Acura Integra (B series engines)

Compatible Engines

• B18A1, B18B1, B18C1, B18C5 (Integra)

Note: This is the ultra lightweight STU version for turbo, track, and racing use with Stage 3+ clutches. If you're daily driving your Integra and running stock or Stage 1/2 clutches, Competition Clutch makes a heavier ST version that's way easier to live with on the street. Lightweight flywheels make your engine rev faster but they kill your low-end drivability. You'll need to rev your engine more to get moving smoothly. Have your flywheel resurfaced or replaced when you're installing a new clutch. Don't reuse a worn or heat-checked flywheel or your new clutch won't work right.