Twin Power 70-E79 FL FX 71-79 XL Advance Unit Screw Replaces H-D 3570
Why this price?
$2.99 is MSRP, the lowest price TwinPower lets us list it at. Additionally, Pro members get $0.51 back on this part.
$2.99 − $0.51 = $2.48
Not sure it fits? Read our tips.
Fitment tips
Fitment can come down to more than year, make and model. Sometimes the sub-model decides, so start with the fitment table below.
- Drive type. If your car is all-wheel drive, make sure the part is for all-wheel drive, not rear-wheel drive.
- Engine size. For engine parts, make sure the engine size on the product matches your engine.
- Transmission. Manual and automatic cars often take different parts.
- Body style. Sedan or hatch, two-door or four-door, cab and bed length on trucks.
Manufacturer data can sometimes have imperfections. Still not sure? We are happy to help.
Send us a message and we will confirm the fit.
Couldn't load pickup availability
Twin Power™ advance unit screw precisely replaces H-D 3570, securing the timer assembly for accurate ignition timing on 1970-early 1979 FL/FX Big Twins and 1971-1979 XL Sportsters.
- Direct OEM replacement ensures stable advance mechanism operation during distributor service
- High-quality steel construction resists vibration and wear in Shovelhead-era engines
- Essential hardware for complete ignition rebuilds or points conversions
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1971-1979 | Harley-Davidson | FLH Electra Glide | Base |
| 1971-1978 | Harley-Davidson | FX Super Glide | Base |
| 1974-1979 | Harley-Davidson | FXE Super Glide | Base |
| 1979 | Harley-Davidson | FXEF Fat Bob | Base |
| 1977-1979 | Harley-Davidson | FXS Low Rider | Base |
| 1971-1979 | Harley-Davidson | XLCH | Base |
| 1977-1978 | Harley-Davidson | XLCR Cafe Racer | Base |
| 1978-1979 | Harley-Davidson | XLS Roadster | Base |
| 1977-1978 | Harley-Davidson | XLT | Base |
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