OEM vs Aftermarket FXR Gas Tank: Which Should You Buy?
If you’re restoring or customizing a Harley-Davidson FXR, choosing the right gas tank is one of the most important decisions you’ll make. The tank defines the bike’s look, fuel capacity, and even resale value.
But here’s the big question:
Should you buy an OEM FXR gas tank or go with an aftermarket FXR gas tank?
In this guide, we’ll break down the pros, cons, pricing, fitment, and performance differences so you can confidently choose the best FXR gas tank for your build. Genuine OEM Harley Davidson FXR Center Fill Red Gas Tank FXRT FXRS
What Is an OEM FXR Gas Tank?
An OEM (Original Equipment Manufacturer) gas tank is a factory-spec tank originally made for the Harley-Davidson FXR models.
That means:
- Factory dimensions
- Correct mounting points
- Stock fuel capacity
- Original styling and contours
OEM tanks are typically used for:
- Stock restorations
- Period-correct builds
- Show-quality restorations
- Maintaining resale value
Pros of OEM FXR Gas Tanks
✔ Perfect factory fit
✔ Maintains originality
✔ Easier resale value
✔ Correct badge and emblem placement
Cons of OEM FXR Gas Tanks
✖ Harder to find (especially clean used ones)
✖ More expensive
✖ Limited styling options
✖ May require refurbishing (if used)
What Is an Aftermarket FXR Gas Tank?
An aftermarket FXR gas tank is manufactured by a third-party company and designed to fit FXR frames.
These tanks often offer:
- Different fuel capacities
- Custom styling (peanut, stretched, Frisco, etc.)
- Raw steel options
- Budget-friendly pricing
Aftermarket tanks are popular for:
- Custom FXR builds
- Club-style builds
- Performance-focused setups
- Budget projects
Pros of Aftermarket FXR Gas Tanks
✔ More affordable
✔ Wider style options
✔ Available brand new
✔ Custom capacity options
Cons of Aftermarket FXR Gas Tanks
✖ Fitment may vary
✖ May require minor modification
✖ Steel thickness can vary
✖ Paint prep sometimes required
OEM vs Aftermarket FXR Gas Tank: Side-by-Side Comparison
| Feature | OEM FXR Gas Tank | Aftermarket FXR Gas Tank |
|---|---|---|
| Fitment | Perfect factory fit | Usually good, sometimes minor adjustments |
| Price | Higher | More budget-friendly |
| Style Options | Limited | Wide variety |
| Availability | Harder to find | Readily available |
| Resale Value | Higher | Moderate |
| Customization | Limited | Excellent |
Which Option Is Better for You?
Choose OEM If:
- You’re restoring a classic FXR to factory spec
- You care about collector value
- You want guaranteed bolt-on fitment
- You prefer original Harley styling
Choose Aftermarket If:
- You’re building a custom FXR
- You want a stretched or Frisco-style tank
- You’re on a budget
- You want a brand-new tank with no rust or repairs
Fitment Tips Before You Buy
Before purchasing any FXR gas tank:
- Confirm your FXR model year
- Check mounting bracket compatibility
- Verify petcock location
- Confirm fuel line routing
- Check tunnel width and backbone clearance
Even among FXR models, slight differences exist. Always verify compatibility before ordering. Genuine OEM Harley Davidson FXR Center Fill Red Gas Tank FXRT FXRS
Cost Breakdown: What Should You Expect to Pay?
OEM FXR Gas Tank
- Used: Higher price depending on condition
- Refinished or NOS: Premium pricing
Aftermarket FXR Gas Tank
- Raw steel: Budget-friendly
- Pre-painted or custom: Mid-range
If you’re building a rider (not a show bike), aftermarket is often the smarter investment.
Performance Considerations
In terms of performance, the tank itself doesn’t directly add horsepower. However:
- Larger capacity tanks increase ride range
- Lightweight tanks reduce overall weight slightly
- Proper venting prevents fuel starvation
For performance builds, weight and fuel delivery consistency matter more than brand name.
Common Buyer Questions
Is aftermarket FXR gas tank quality good?
Yes — but quality varies by manufacturer. Look for:
- Thick-gauge steel
- Clean welds
- Proper mounting brackets
- Good internal coating
Will an aftermarket tank bolt straight on?
Most are designed as direct-fit, but minor adjustments may be required.
Does OEM always fit better?
Typically yes, but condition matters. A bent used OEM tank can fit worse than a quality aftermarket one. harleydavidson.com