ACT 17-21 Honda Civic / 18-21 Honda Accord XACT Flywheel Streetlite
The ACT 601190 is an XACT Streetlite single-mass flywheel for the 1.5L turbo Honda Civic with a 6-speed manual, including the 10th-generation Civic Si, and the manual 1.5L Accord. Owners look for it when the factory dual-mass flywheel starts to rattle or shudder, when they are building up an ACT clutch for a tuned car, or when they want quicker revs between shifts. It is a forged chromoly part that ACT calls its most durable flywheel offering.
The 1.5T Civic, including the Si, leaves the factory with a dual-mass flywheel, which has springs between two masses to soak up engine pulses before they reach the gearbox. It works well when new, but it is heavy and it wears. The 601190 replaces it with a one-piece single-mass flywheel. ACT lists it at 17.6 lb with a 240 mm (9.4 in) friction surface and a 139-tooth ring gear, built from heat-treated chromoly steel with an induction-hardened ring gear, then CNC machined and dynamically balanced. ACT describes the result as noticeably better engine response and acceleration, with OE to mild gear rattle, and rates it for both street and race use. Because it is one piece, there are no inserts to warp or ring gear to come loose, and the face can be resurfaced later instead of replacing the whole flywheel.
One rule matters most: ACT states this flywheel must be used with an ACT pressure plate and disc, which are not included. Flywheel bolts (M12-1.0 x 25 mm) are included.
A worn dual-mass flywheel usually shows up as rattle at idle, clunks on and off the throttle, and visible rotational play between the two halves once the gearbox is out. Our dual-mass flywheel failure guide explains the checks, and dual-mass vs single-mass differences covers what changes when you switch, including a little more gear rattle. If your real complaint is slip, confirm it with the slipping diagnosis guide before buying parts, and see the flare vs slip explainer to describe it accurately.
Our listing covers the 2017-2021 Honda Civic 1.5L turbo manual and the 2018-2021 Accord 1.5L turbo manual. ACT's application chart lists 2017-2021 Civic 1.5L trims including the Si, Sport and EX-T, and 2018-2020 Accord LX and Sport 1.5L. ACT also lists later 1.5L Civic and Integra applications. It does not fit the 2.0L Civic Type R, the 2.0L Accord, or any automatic or CVT car. Send us your year, trim and VIN before ordering and we will confirm it.
If you are buying a complete clutch for a 2017-2019 Civic Si, note that ACT kits such as the HC10-HDSS street kit and the HC10-HDG6 race kit already include this flywheel. The standalone 601190 is for replacing a damaged one, building a spare, or pairing with an ACT plate and disc bought separately. More flywheels and clutches are in our hard parts collection.
| Brand | ACT |
| Part number | 601190 |
| Fits | ACT 17-21 Honda Civic / 18-21 Honda Accord XACT Flywheel Streetlite |
| Vehicle fitment | Honda Civic / 18-21 Honda (2017-2021) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT states the 601190 must be used with an ACT pressure plate and disc, which are not included.
Yes. ACT HC10 kits for the 2017-2019 Civic Si include the 601190 Streetlite flywheel, so you only need this separately as a replacement or spare.
ACT describes OE to mild gear rattle. Going from a dual-mass to a single-mass flywheel usually adds a little rattle at idle.
Yes. ACT says its flywheels are serviceable and can be resurfaced without buying additional parts.
No. It is for the 1.5L turbo Civic and Accord manual. The 2.0L Type R uses a different flywheel.
ACT lists the 601190 at 17.6 lb with a 240 mm friction surface and a 139-tooth ring gear.
