ACT Clutch Flywheel Works With Honda Civic/Integra 1.5T

ACT 601190 XACT Streetlite Flywheel for Honda/Acura 1.5T

If you're building or servicing an ACT HC10 clutch conversion on your 1.5T Honda or Acura, keep the flywheel in that same plan. ACT's 601190 Streetlite is a 17.6 lb forged chromoly steel flywheel with a 240 mm friction face. You'll need the matching ACT pressure plate and disc, purchased separately with this listing.

Choose the assembly you'll want to drive

We'd choose your clutch disc around the car's torque and the driving it still has to do. ACT recommends Streetlite for street and race use and favors the design for street or drag racing. That doesn't mean you have to put a rigid race disc in a Civic that still does the commute. Get the capacity you need without taking on engagement behavior you don't want in traffic.

A lighter flywheel changes how readily the engine gains and loses revs. It also leaves less stored rotational energy to help as you pull away. Consider that alongside the disc's takeup, rather than treating the flywheel's weight as the whole decision. ACT describes 601190's gear rattle as OE to mild. We'd include noise tolerance in the choice; that rating isn't a promise that every clutch combination will be silent.

Why the chromoly construction matters

The one-piece steel layout gives you a serviceable friction face without a separate insert to buy at the next clutch change. If you're comparing a flywheel that uses a replaceable insert, include that difference in your servicing plan. With 601190, you'll have the face resurfaced within ACT's limits while keeping the correct flywheel step.

ACT uses a heat-treated chromoly forging, CNC machines the flywheel and dynamically balances it. The ring gear is induction hardened for wear resistance. The one-piece construction also carries heat from the clutch disc through the flywheel without a separate friction insert. We wouldn't pick it on weight alone: the material, construction and ability to service the face are part of what you're buying.

Use it with the matching ACT conversion parts

601190 must be used with ACT pressure-plate and disc components for this application. It isn't an order to make from the car's year alone. If you've got the original clutch still in the car, plan the complete matched conversion rather than assume a loose flywheel can take its place.

Check your kit contents too. ACT includes this flywheel with the specified HC10 conversion kits. We'd buy the separate 601190 when you're assembling a matching setup from individual parts or replacing the flywheel in an existing conversion. If you've already ordered a complete HC10 kit, you may already have it covered.

The HC10-HDSS is one street-disc setup to compare: ACT rates the kit at 363 lb-ft at the crank and uses a sprung organic disc. The HC10-HDR4 has a rigid four-pad ceramic race disc and a 464 lb-ft crank rating. ACT lists 601190 with those HC10 combinations. Those figures rate the clutch kits, not this flywheel.

For your daily Civic Si or Integra A-Spec, our starting point would be the organic street disc if your engine's torque falls within its rating. ACT describes the HDR4's engagement as aggressive, with increased gear rattle, and recommends it for race use only. We'd accept those trade-offs for a race build that needs the kit's capacity. We'd be slower to choose them for a commuter simply because the number is higher.

Selected 1.5T manual fitment

Every row here requires the stated 1.5-liter turbo engine, a manual transmission and the matching ACT clutch arrangement. Check the powertrain as well as the trim name. These applications don't cover the 2.0-liter Civic Type R or Integra Type S, automatic or CVT versions, or every engine sold under the same Civic trim.

Parts and checks for the clutch job

You'll get the flywheel and its M12-1.0 x 25 mm flywheel bolts. The pressure plate and disc aren't included. Check the bearings, release system and assembly hardware for your matched clutch before starting. Use the factory procedure and the correct ACT instructions for the actual parts you're fitting; don't copy a torque value from a different bolt size or clutch kit.

While the gearbox is out, check for oil leaks and inspect the release components. Fix the problem before putting new friction parts back in. ACT's general instructions call for checking the disc on the input shaft and making sure the pressure plate locates on the flywheel dowels. We'd do those fit checks while you still have access, rather than find the mismatch during the gearbox refit.

At the next clutch service

Take ACT's resurfacing limit to the machinist with the flywheel. ACT allows no more than 0.040 inch / 1.02 mm to be removed and calls for a flywheel grinder in good condition, removing only what is needed for cleanup. Preserve the correct step between the friction face and pressure-plate mounting surface. That step sets the pressure plate's working geometry; a clean face alone isn't enough.

Don't treat the machining limit as another allowance you can use at every clutch change. Have the flywheel inspected, including for cracks, before deciding to resurface it. ACT lists a 12-month limited warranty for 601190. Keep your authorized-dealer receipt with the clutch paperwork and check its current terms before a claim; installation labor isn't covered.