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2003 Harley Davidson FXSTB/I Night Train

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 2003 Harley Davidson FXSTB/I Night Train

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

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Cerwin-Vega PRD

1" Replacement Diaphragm for P1T, P175T, P1SRT Pro Mobile Tweeters

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1" Replacement Diaphragm for P1T, P175T, P1SRT Pro Mobile Tweeters

• 1" diaphragm for all Pro Mobile tweeters
• Applicable for models: P1T, P175T, P1SRT
• Does not fit Cerwin Vega P75T and P5T tweeters
• East to install, no cutting or drilling required
• Improves high‑frequency performance

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List price $47.99
-17% $39.99

In stock.

• 1" diaphragm for all Pro Mobile tweeters
• Applicable for models: P1T, P175T, P1SRT
• Does not fit Cerwin Vega P75T and P5T tweeters
• East to install, no cutting or drilling required
• Improves high‑frequency performance

Limited time!

Kenwood DRV-A610WDP

LCD Compact 4K HD Front and Rear Dashboard Camera Package with Wi-Fi and GPS

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LCD Compact 4K HD Front and Rear Dashboard Camera Package with Wi-Fi and GPS

• 8.3 Megapixel Recording (front cam)
• 3.7 Megapixel Recording (rear cam)
• 3.0" LCD Display (front cam only)
• Integrated GPS system
• Touch panel control

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List price $380.00
Save $101.00
-27% $279.00

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Only 2 Left!

• 8.3 Megapixel Recording (front cam)
• 3.7 Megapixel Recording (rear cam)
• 3.0" LCD Display (front cam only)
• Integrated GPS system
• Touch panel control

Escort Redline 360c

Radar and Laser Detector with Android Auto and Apple CarPlay Support

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Radar and Laser Detector with Android Auto and Apple CarPlay Support

• Multi-Band Radar and Laser Detection
• Graphic Color OLED display with current speed, vehicle voltage, and alert area monitors
• User, pilot, arrow and meter modes
• Directional arrows provide true 360-degree awareness
• Installs on the windshield

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List price $899.99
-11% $799.95

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• Multi-Band Radar and Laser Detection
• Graphic Color OLED display with current speed, vehicle voltage, and alert area monitors
• User, pilot, arrow and meter modes
• Directional arrows provide true 360-degree awareness
• Installs on the windshield

Tru Spec Single 12" (1447TS)

Empty Single 12" Vented Prefabricated Enclosure for Sundown SA12V2 Subwoofers

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Empty Single 12" Vented Prefabricated Enclosure for Sundown SA12V2 Subwoofers

• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 1.75 cubic feet
• Compatible for Sundown SA12V2 subwoofers (Sold separately)

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9
List price $289.99
-40% $174.99

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Tru Spec 6.5" Speaker Rings

6.5" MDF Speaker Rings (1 Pair) Tru Spec Series (Made in the USA)

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6.5" MDF Speaker Rings (1 Pair) Tru Spec Series (Made in the USA)

• Material: 0.75" MDF
• Inner Diameter: 5.85"
• Outer Diameter: 7.5"

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List price $12.99
-46% $6.99

In stock

Only 1 Left!

• Material: 0.75" MDF
• Inner Diameter: 5.85"
• Outer Diameter: 7.5"

Stinger SSGA48

Stinger Select 4 to 8 Ga Set Screw Gauge Adapter

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Stinger Select 4 to 8 Ga Set Screw Gauge Adapter

• Brass Construction
• 4 GA to 8 GA
• Nickel Plated Finish
• Large Set Screws

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3
List price $9.00
-11% $7.99

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Ships in 10-14 days

• Brass Construction
• 4 GA to 8 GA
• Nickel Plated Finish
• Large Set Screws

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.0 cu ft airspace 12SQTC)

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12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.0 cu ft airspace 12SQTC)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

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172
$69.99

In stock

NVX XW4BL5

5 ft 4-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Blue)

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5 ft 4-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Blue)

• 5 feet 4 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue

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List price $29.99
-33% $19.99

In stock

Used from: $10.49

• 5 feet 4 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue

DS18 INF-C15A

16A Portable Automatic Smart Lithium AGM Multi-Battery Charger and Maintainer

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16A Portable Automatic Smart Lithium AGM Multi-Battery Charger and Maintainer

• Portable smart car battery charger and maintainer
• Single 15 amp output with clamp or bolt-on connection
• Supports 6 or 12 volt system
• Works on Lead-Acid, Wet, Gel, AGM, Calcium, Lithium (LiFePO4)
• Thermal, reverse, over charge, over current protection
• Charges multiple battery sizes and types

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$239.95

Available

Ships in 10-14 days

• Portable smart car battery charger and maintainer
• Single 15 amp output with clamp or bolt-on connection
• Supports 6 or 12 volt system
• Works on Lead-Acid, Wet, Gel, AGM, Calcium, Lithium (LiFePO4)
• Thermal, reverse, over charge, over current protection
• Charges multiple battery sizes and types

Directed 504D

Stinger DoubleGuard Shock Sensor

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Stinger DoubleGuard Shock Sensor

• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

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List price $31.99
-38% $19.99

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Only 3 Left!

• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

Kicker GL712 (08GL712)

Square Grille for Kicker 12" Solo-Baric L7 Subwoofers

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Square Grille for Kicker 12" Solo-Baric L7 Subwoofers

• 12" Cast Aluminum Subwoofer Grille
• Enhances the Look of your 08 Series Kicker Solo-Baric Subwoofers
• Protects the Sub from Damage
• Gives your Woofer an Attractive Look

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$34.99

In stock

• 12" Cast Aluminum Subwoofer Grille
• Enhances the Look of your 08 Series Kicker Solo-Baric Subwoofers
• Protects the Sub from Damage
• Gives your Woofer an Attractive Look

JBL BassPro SL 2 (SUBBPSL2AM)

125W RMS Loaded Single 8" Amplified Under-Seat Compact Subwoofer Enclosure

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125W RMS Loaded Single 8" Amplified Under-Seat Compact Subwoofer Enclosure

• 8" Amplified Loaded Subwoofer System
• 125 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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List price $429.95
-12% $379.95

In stock

Only 2 Left!

• 8" Amplified Loaded Subwoofer System
• 125 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

NVX VAD17001 v2 (VAD17001v2)

3400W Peak (1700W RMS) Class D V-Series Monoblock Car/Marine/Powersports Amplifier with Bass Remote

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3400W Peak (1700W RMS) Class D V-Series Monoblock Car/Marine/Powersports Amplifier with Bass Remote

• 800 watts x 1 channel @ 4 ohm
• 1350 watts x 1 channel @ 2 ohm
• 1700 watts x 1 channel @ 1 ohm
• Total RMS Power: 1700 watts
• Class D 1 ohm Stable Monoblock Amplifier

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35
List price $335.99
-23% $259.99

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Available Offers (2) for NVX VAD17001 v2 (VAD17001v2)
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Dads & Grads Sale! Save 15% at Checkout!
List price $335.99
-23% $259.99
$220.99 with coupon | Price details
2026-06-30 23:59:00
Save 30% on an NVX XKIT42 Amp Kit with Purchase! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT42 Amp Kit! No code needed — discount applies automatically at checkout.

Sundown Audio 4BLK

4-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

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4-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

• 10-pack 4-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

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List price $6.59
-17% $5.49

In stock

Only 2 Left!

• 10-pack 4-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

NVX VSLR60

60-Ohm Load Resistors for 2018-up Dodge/Chrysler/Jeep/RAM/Fiat vehicles with Amplified Systems

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60-Ohm Load Resistors for 2018-up Dodge/Chrysler/Jeep/RAM/Fiat vehicles with Amplified Systems

• 60 Ohm Load Resistors
• Prevents Audio Shutdown and Distortion
• Compatible with most devices with speaker-level inputs
• Works in select 2018-up Chrysler-built vehicles
• Sold as a pair

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List price $39.99
-63% $14.99

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• 60 Ohm Load Resistors
• Prevents Audio Shutdown and Distortion
• Compatible with most devices with speaker-level inputs
• Works in select 2018-up Chrysler-built vehicles
• Sold as a pair

XS Power D3100

3000W 872 Ah Absorbent Glass Mat (AGM) Car Battery

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3000W 872 Ah Absorbent Glass Mat (AGM) Car Battery

• 12-volt Absorbent Glass Mat (AGM) Car Battery
• Sealed Absorbent Glass Mat (AGM) design
• Perfect for 4000W audio stereo systems
• Compatible with many Domestic and Japanese vehicles

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28
List price $549.99
-9% $499.99

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Stinger SHD821

HPM Series MANL/MIDI Fused Power Distribution Block with Satin Chrome Finish

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HPM Series MANL/MIDI Fused Power Distribution Block with Satin Chrome Finish

• HPM Series Fused Power Distribution Block
• Two 1/0 Gauge or 4 Gauge Inputs
• Four 4/8 Gauge Outputs
• Multiple Input/Output Design
• Protective Cover Included
• Corrosion Resistant Satin Chrome Finish

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List price $69.00
-51% $33.99

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• HPM Series Fused Power Distribution Block
• Two 1/0 Gauge or 4 Gauge Inputs
• Four 4/8 Gauge Outputs
• Multiple Input/Output Design
• Protective Cover Included
• Corrosion Resistant Satin Chrome Finish

Deaf Bonce MFA 2.420

1260W RMS Class D Machete Series 2 Channel Car Amplifier

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1260W RMS Class D Machete Series 2 Channel Car Amplifier

• 420 watts x 2 channel @ 4 ohm
• 630 watts x 2 channel @ 2 ohm
• Bridged: 1260 watts x 1 channel @ 4 ohm
• Total RMS Power: 1260 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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$229.90

In stock

Only 3 Left!

• 420 watts x 2 channel @ 4 ohm
• 630 watts x 2 channel @ 2 ohm
• Bridged: 1260 watts x 1 channel @ 4 ohm
• Total RMS Power: 1260 watts
• Class D 2 ohm Stable 2-Channel Amplifier

Crimestopper SP-402

1-Way Remote Start Keyless Entry Car Alarm System with (2) 1500 ft Range 5-Button LED Transmitters

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1-Way Remote Start Keyless Entry Car Alarm System with (2) 1500 ft Range 5-Button LED Transmitters

• 1-Way Remote Car Starter
• 5-Button LED Transmitter
• 1500 feet of range (0.28 miles)
• Dual 2-way data port
• Multi-vehicle functionality

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-68% $79.99

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• 1-Way Remote Car Starter
• 5-Button LED Transmitter
• 1500 feet of range (0.28 miles)
• Dual 2-way data port
• Multi-vehicle functionality

Deaf Bonce MFA 4.180

1080W RMS Class D Machete Series 4 Channel Car Amplifier

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1080W RMS Class D Machete Series 4 Channel Car Amplifier

• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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$259.90

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Available Offers (2) for Deaf Bonce MFA 4.180
FREE Belva Amp Kit at Checkout!
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.

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    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Harley Davidson FXSTB/I Night Train?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your FXSTB/I Night Train.

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