# Twin Power 70-79 Big Twin 71-79 XL Advance Unit Replaces HD 32517-70T

Twin Power™ advance unit precisely replaces H-D 32517-70T, restoring accurate ignition timing for 1970-1979 Big Twins and 1971-1979 XL Sportsters during critical distributor service.

-   Direct OEM replacement ensures smooth power delivery and prevents detonation issues
-   Includes timer screw, advance cam and mounting hardware for complete installation
-   Perfect for Shovelhead rebuilds and points-to-EVO ignition 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

1970-1979

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

## Details

- **Price:** 76.52 CAD
- **Vendor:** TwinPower
- **Type:** Distributors

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 76.52 CAD | In stock |

## Images

- Photo - Primary

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/twin-power-70-79-big-twin-71-79-xl-advance-unit-replaces-hd-32517-70t)
> Updated: 2026-07-14