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1981 Chevrolet K5 Blazer

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 1981 Chevrolet K5 Blazer

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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NVX XSBI200

200-Amp Microprocessor-Controlled Dual Sensing Smart Battery Isolator and Relay (Handles up to 300-Amp Surge)

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200-Amp Microprocessor-Controlled Dual Sensing Smart Battery Isolator and Relay (Handles up to 300-Amp Surge)

• 200-Amp continuous / 300-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

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List price $79.99
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Used from: $45.99

• 200-Amp continuous / 300-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

Rockford Fosgate P2P3G-12

Mesh Grille for Rockford Fosgate 12" Punch P2 and P3 Subwoofers

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Mesh Grille for Rockford Fosgate 12" Punch P2 and P3 Subwoofers

• 12" Subwoofer Grille for Rockford Fosgate P2,P3, and P3 Shallow
• Black Gloss Finish
• Mesh Design for Maximum Protection

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$34.99

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• 12" Subwoofer Grille for Rockford Fosgate P2,P3, and P3 Shallow
• Black Gloss Finish
• Mesh Design for Maximum Protection

Install Bay PSP6

Complete ABS Port Tube Kit - 6" x 11" Port

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Complete ABS Port Tube Kit - 6" x 11" Port

• Complete Port Tube Kit
• 6" x 11" Port
• Achieve Greater Sound Pressure Levels with Less Distortion
• High Quality ABS Construction
• Mounting Hole Variations
• Designed in the U.S.A.

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• Complete Port Tube Kit
• 6" x 11" Port
• Achieve Greater Sound Pressure Levels with Less Distortion
• High Quality ABS Construction
• Mounting Hole Variations
• Designed in the U.S.A.

Cerwin Vega HS102D

800W Peak (200W RMS) 10" HED Series Dual 2-ohm Shallow Subwoofer

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800W Peak (200W RMS) 10" HED Series Dual 2-ohm Shallow Subwoofer

• Peak Power: 800 watts
• RMS Power: 200 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Treated Foam Surround
• Mount depth: 3.54"
• Sensitivity: 83.1 dB

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Belva BAMMD3

Automotive 9-Function Digital Multimeter Tester

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Automotive 9-Function Digital Multimeter Tester

• Features easy-to-read 2-3/4" Digital display
• Updates 2.5 times per second
• Low battery indicator
• Over range indicator
• Includes two 36 in. 18 gauge CCA test leads

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• Features easy-to-read 2-3/4" Digital display
• Updates 2.5 times per second
• Low battery indicator
• Over range indicator
• Includes two 36 in. 18 gauge CCA test leads

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

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

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Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

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

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

Omega LINKRLT3

Remote Start Smartphone App Upgrade with Advanced GPS Functionality

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Remote Start Smartphone App Upgrade with Advanced GPS Functionality

• Smartphone remote start car alarm app
• Compatible with Android and iPhone devices
• Unlimited range (subject to service coverage area)
• Shareable with multiple users, with set expiration date
• Premium and Premium Plus service plans available

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List price $199.95
-32% $135.99

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• Smartphone remote start car alarm app
• Compatible with Android and iPhone devices
• Unlimited range (subject to service coverage area)
• Shareable with multiple users, with set expiration date
• Premium and Premium Plus service plans available

Limited time!

JL Audio RD400/4

400W RMS Class D RD Series 4 Channel Car Amplifier

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400W RMS Class D RD Series 4 Channel Car Amplifier

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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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

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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 MIR-BRKT-437

Set of 7 Mirror Brackets for Crimestopper Mirrors with 4.3" & 7" LCD Screens

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Set of 7 Mirror Brackets for Crimestopper Mirrors with 4.3" & 7" LCD Screens

• 7-Pack
• Vehicle Specific Mirror Brackets
• Works Exclusively with the Crimestopper Mirrors with 4.3" and 7" LCD Screens

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List price $44.92
-56% $19.95

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• 7-Pack
• Vehicle Specific Mirror Brackets
• Works Exclusively with the Crimestopper Mirrors with 4.3" and 7" LCD Screens

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
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• 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

Dual MANT16B

16" Marine AM/FM Antenna with Swivel Base and 54" Cable (Black)

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16" Marine AM/FM Antenna with Swivel Base and 54" Cable (Black)

• Marine stereo AM/FM antenna with flexible mast
• Includes 180° swivel base and 54" antenna cable
• Made with durable steel and corrosion-resistant rubber cover

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$19.99

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• Marine stereo AM/FM antenna with flexible mast
• Includes 180° swivel base and 54" antenna cable
• Made with durable steel and corrosion-resistant rubber cover

Metra IBWRD88

Dual 8-Gauge to 8-Gauge Input Wire Reducers

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Dual 8-Gauge to 8-Gauge Input Wire Reducers

• Dual 8-gauge input and output to 8-gauge wire reducer
• Machined brass construction with Chrome finish
• Designed for aftermarket audio upgrades in any vehicle

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List price $24.99
-12% $21.99

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• Dual 8-gauge input and output to 8-gauge wire reducer
• Machined brass construction with Chrome finish
• Designed for aftermarket audio upgrades in any vehicle

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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Used from: $10.49

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

American International SG-650DX

Universal 0.5" Spacers for 6.5" Speakers

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Universal 0.5" Spacers for 6.5" Speakers

• Universal spacers for car speakers
• Includes 2 spacers (screws not included)
• Compatible Speaker Size: 6.5"
• Spacer Thickness: 0.5"

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• Universal spacers for car speakers
• Includes 2 spacers (screws not included)
• Compatible Speaker Size: 6.5"
• Spacer Thickness: 0.5"

Sundown Audio 1/0BLK

1/0-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

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1/0-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

• 10-pack 1/0-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

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List price $7.19
-17% $5.99

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Only 2 Left!

• 10-pack 1/0-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

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

Directed 504K

OEM Interface Stinger with LED Valet Switch Pod

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OEM Interface Stinger with LED Valet Switch Pod

• OEM Alarm Shock Sensor Upgrade Kit
• Allows factory alarm systems to detect impacts to the vehicle
• Designed to interface for factory alarms extra sensor input

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• OEM Alarm Shock Sensor Upgrade Kit
• Allows factory alarm systems to detect impacts to the vehicle
• Designed to interface for factory alarms extra sensor input

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

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• 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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    FAQ for Universal-Fit Audio & Electronics in 1981 K5 Blazer

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 Chevrolet K5 Blazer?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your K5 Blazer.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.