Find Parts That Fit
Twin Power 78-89 Big Twin Manifold Spacer Replaces H-D 29250-78 With Butterfly Carburetor
$12.99
Not sure it fits? Ask our fitment team — we check before it ships.
$12.99
$12.99
Tech Specs
- Brand
- TwinPower
- SKU
- TWP493373
- Shipping weight
- 0.15 lb
Twin Power™ manifold spacer replaces H-D 29250-78 for 1978-1989 Big Twin models equipped with butterfly carburetors, ensuring proper intake alignment.
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1980-1984,1987-1989 | Harley-Davidson | FLHS Electra Glide Sport | Base |
| 1986-1989 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 1983-1989 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 1989 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 1986-1989 | Harley-Davidson | FLST Heritage Softail | Base |
| 1988-1989 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 1980-1983 | Harley-Davidson | FLT Tour Glide | Base |
| 1987-1989 | Harley-Davidson | FXLR Low Rider Custom | Base |
| 1982-1990 | Harley-Davidson | FXRS Low Glide | Base |
| 1986-1990 | Harley-Davidson | FXRS-SP Low Rider Sport | Base |
| 1983-1990 | Harley-Davidson | FXRT Sport Glide | Base |
| 1977-1982 | Harley-Davidson | FXS Low Rider | Base |
| 1983-1985 | Harley-Davidson | FXSB Low Rider - Belt | Base |
| 1986-1989 | Harley-Davidson | FXSTC Softail Custom | Base |
| 1988-1989 | Harley-Davidson | FXSTS Springer Softail | Base |
| 1980-1986 | Harley-Davidson | FXWG Wide Glide | Base |
- Direct OEM replacement restores factory manifold spacing on Evolution-era Harley engines
- Essential for carb rebuilds, preventing vacuum leaks and optimizing throttle response
- Precision-machined for secure fit between carburetor and intake manifold
Related Tech Articles
How to Choose a Big Brake Kit Without Overbuying
A big brake kit doesn't shorten your stopping distance — tires do. What it actually buys is heat capacity and pedal consistency. How to choose rotor diameter, piston area and pad compound, and when fluid and pads are the smarter spend.
Where Exhaust Power Actually Comes From
Almost every cat-back horsepower claim online is unsourced. Here's what an independent dyno test actually measured, why scavenging lives in the headers and not the cat-back, and where the power really is on a turbo car.
Coilovers vs Lowering Springs: How to Actually Decide
Both lower the car — but the decision is really about the damper. Why stock dampers and aftermarket spring rates fight each other, when springs are genuinely the right call, and what each path costs you beyond the parts.
- Choosing a selection results in a full page refresh.
- Opens in a new window.