ACT XACT Flywheel Streetlite
The ACT 600225 XACT Streetlite is a 14.1 lb chromoly flywheel for the Nissan SR20DET with its matching five-speed gearbox. ACT lists it for the 1991 to 1998 S13 and S14 Silvia, and in the US it is the flywheel most often bought for 240SX chassis that have been converted to the SR20DET and SR gearbox. Buyers usually reach this page during a clutch job on a drift or street car, when the old flywheel is blued, cracked or warped, or when they want the turbo four to rev up faster between shifts without the noise of a race-weight wheel.
The flywheel is the back friction face for the clutch disc, carries the starter ring gear and stores the rotating mass that smooths idle and low-speed pull-away. ACT forges the 600225 from heat-treated chromoly steel, induction-hardens the 108-tooth ring gear and machines a 240 mm (9.4 in) friction surface. It carries SFI 1.1 certification. ACT describes Streetlite as its most durable flywheel line and rates the feel as noticeably quicker engine response with OE to mild gear rattle. On an SR20DET that means quicker rev-matching and less lag between gears, while still idling and crawling in traffic the way a street car should.
Separate clutch faults from flywheel faults first. A slip test in a high gear shows whether rpm climbs without speed; the slipping diagnosis guide walks through it, and the resurface vs replace guide explains when a machine shop can save the old part. With the gearbox off, check runout with a dial indicator and inspect every ring gear tooth. ACT notes its flywheels can later be resurfaced without buying extra parts, so this one can outlast several clutches.
ACT's application list for the 600225 is the 1991 to 1998 Nissan Silvia with the 2.0L SR20DET turbo engine. It is an SR20DET flywheel, not a KA24DE part: a stock-engine US 240SX uses a different ACT flywheel, so only buy this for a 240SX that runs the SR20DET with an SR-pattern clutch. Late S15 cars and cars with swapped six-speed gearboxes can differ, so send us the year, chassis and engine details or VIN before ordering if you are unsure. Other drivetrain parts are in the hard parts collection.
If you want a lighter aluminum option, compare the SPEC SN22A. The ACT 600225 is new, in stock, ships the same business day from the USA and carries a 1-year warranty.
| Brand | ACT |
| Part number | 600225 |
| Fits | ACT XACT Flywheel Streetlite |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists the 600225 for the SR20DET Silvia. A 240SX with the factory KA24DE uses a different ACT flywheel. Buy this only if the car runs an SR20DET with an SR clutch and gearbox.
ACT lists it at 14.1 lb. It is forged chromoly with a 240 mm friction surface and a 108-tooth ring gear.
ACT rates Streetlite flywheels at OE to mild gear rattle. It is the street-friendly ACT option, with less noise than their lighter Prolite line.
ACT says its clutches work with good aftermarket flywheels, and most 240 mm SR20DET clutches will bolt to the 600225. Confirm the clutch maker's step height and flywheel requirements first.
Yes. ACT states its flywheels are serviceable and can be resurfaced with no need to buy additional parts. Have the shop keep the step height correct.
