Garage
Shop

2021 BMW M8

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 2021 BMW M8

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.

Loading...
Filters
filter-icon Filters & Sort

Crux RCA-17MM

17 FT. RCA Male to Male Cable, Clear Jacket

RCA-17MM big
Go to item page Right Arrow Icon of Right Arrow

17 FT. RCA Male to Male Cable, Clear Jacket

• RCA male-to-male
• Clear jacket
• 17 Ft.

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $7.98
-36% $5.13

In stock

Only 2 Left!

• RCA male-to-male
• Clear jacket
• 17 Ft.

JL Audio XE-BLKAIC2-18

18 Ft. 2-Channel Premium Audio RCA Interconnect Cable (Black)

XE-BLKAIC2-18 big
Go to item page Right Arrow Icon of Right Arrow

18 Ft. 2-Channel Premium Audio RCA Interconnect Cable (Black)

• 18 Ft. 2-Channel Premium Audio RCA Interconnect Cable
• Pure OFC copper conductors and polyethylene dielectrics
• Twisted-pair wire construction to reject noise
• Braided black outer jacket for protection
• Cable Length: 18 feet / 5.49 meter

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $8.50 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$84.99

Available

Ships in 10-14 days

• 18 Ft. 2-Channel Premium Audio RCA Interconnect Cable
• Pure OFC copper conductors and polyethylene dielectrics
• Twisted-pair wire construction to reject noise
• Braided black outer jacket for protection
• Cable Length: 18 feet / 5.49 meter

Stinger SI92YF

2-Channel 9000 Series Premium RCA Audio Y-Adapter Cable, 2 Female to 1 Male

SI92YF big
Go to item page Right Arrow Icon of Right Arrow

2-Channel 9000 Series Premium RCA Audio Y-Adapter Cable, 2 Female to 1 Male

• Pure silver conductors for full midrange & crystal clear highs
• 5-layer signal protection to keep music in and noise out
• Rhodium plated machined copper RCA ends
• Ultra OFC long grain copper conductors

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $23.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $299.00
-20% $239.00

In stock

Only 2 Left!

• Pure silver conductors for full midrange & crystal clear highs
• 5-layer signal protection to keep music in and noise out
• Rhodium plated machined copper RCA ends
• Ultra OFC long grain copper conductors

Stinger XI269

9 ft 6-Channel X2 Series RCA Interconnect Cable

XI269 big
Go to item page Right Arrow Icon of Right Arrow

9 ft 6-Channel X2 Series RCA Interconnect Cable

• 6 RCA Interconnect Cable
• Finely stranded silver-plated, pure Oxygen-Free Copper material
• High-strength Nylon fibers around the ultra-flexible PVC cable
• Color: Black
• Length: 9 feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $18.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $239.00
-21% $189.00

Available

Ships in 10-14 days

• 6 RCA Interconnect Cable
• Finely stranded silver-plated, pure Oxygen-Free Copper material
• High-strength Nylon fibers around the ultra-flexible PVC cable
• Color: Black
• Length: 9 feet

Kicker 46QI46 (QI46)

Q-Series 4-CH RCA Interconnection cable 6-Meters (19.7 ft)

QI46 big
Go to item page Right Arrow Icon of Right Arrow

Q-Series 4-CH RCA Interconnection cable 6-Meters (19.7 ft)

• Length: 6 meters
• Slip free installation
• Intergrated AR™ foil shielding

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $9.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

6
$89.99

Available

Ships in 10-14 days

• Length: 6 meters
• Slip free installation
• Intergrated AR™ foil shielding

StreetWires Zero Noise 5 (ZN5435)

11,5 ft Zero Noise 5 4-Channel RCA Interconnect Patch Cable

ZN5435 big
Go to item page Right Arrow Icon of Right Arrow

11,5 ft Zero Noise 5 4-Channel RCA Interconnect Patch Cable

• 4-Channel RCA Interconnect Cable
• Made from Oxygen Free Copper (OFC) material
• Twisted pair design protects against interference
• Clear ultra-flex dual jacket
• Color: Black
• Length: 11.5 feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $71.45
-9% $64.95

Available

Ships in 10-14 days

• 4-Channel RCA Interconnect Cable
• Made from Oxygen Free Copper (OFC) material
• Twisted pair design protects against interference
• Clear ultra-flex dual jacket
• Color: Black
• Length: 11.5 feet

Stinger SSRCB6

Competition Series Twisted RCA Interconnect - 6 Ft

SSRCB6 big
Go to item page Right Arrow Icon of Right Arrow

Competition Series Twisted RCA Interconnect - 6 Ft

• 2 Male to 2 Male
•6 ft RCA Interconnect Chord
• Color: Blue

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$9.99

Available

Ships in 10-14 days

• 2 Male to 2 Male
•6 ft RCA Interconnect Chord
• Color: Blue

Stinger XI1117

17 ft. X1 Series Toslink Fibreoptic Interconnect Cable

XI1117 big
Go to item page Right Arrow Icon of Right Arrow

17 ft. X1 Series Toslink Fibreoptic Interconnect Cable

• 17 ft. Toslink fiber-optic interconnect cable
• Extended frequency response
• Supports multi-channel audio
• Medical-grade fiber optic core

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $6.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $79.00
-13% $69.00

In stock

Only 1 Left!

• 17 ft. Toslink fiber-optic interconnect cable
• Extended frequency response
• Supports multi-channel audio
• Medical-grade fiber optic core

Stinger SI4820

20 Ft 4000 Series Video Composite Cable

SI4820 big
Go to item page Right Arrow Icon of Right Arrow

20 Ft 4000 Series Video Composite Cable

• 4000 Series Video Composite Cable
• 20 ft. Cable Length
• Stinger Audiophile Grade
• Twisted Pair Construction
• Clear Protective Jacket
• Audiophile Grade
• Twisted-Pair Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $39.00
-64% $13.99

Available

Ships in 10-14 days

• 4000 Series Video Composite Cable
• 20 ft. Cable Length
• Stinger Audiophile Grade
• Twisted Pair Construction
• Clear Protective Jacket
• Audiophile Grade
• Twisted-Pair Construction

Stinger SI129

9 Ft 1000 Series 2-Channel Audiophile Grade RCA Stereo Interconnect Cable

SI129 big
Go to item page Right Arrow Icon of Right Arrow

9 Ft 1000 Series 2-Channel Audiophile Grade RCA Stereo Interconnect Cable

• 1000 Series 2-Channel RCA Stereo Interconnect Cable
• Audiophile Grade Performance
• Compact Molded Ends
• Heavy Gauge Conductors
• Molded Strain Reliefs
• ShocKrome Ends
• Cable Length: 9 Feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

4
List price $19.00
-42% $10.95

In stock

Only 1 Left!

• 1000 Series 2-Channel RCA Stereo Interconnect Cable
• Audiophile Grade Performance
• Compact Molded Ends
• Heavy Gauge Conductors
• Molded Strain Reliefs
• ShocKrome Ends
• Cable Length: 9 Feet

Stinger SSPRCA2M

Stinger Select Performance Series 2 Male to 1 Female RCA Y Interconnect

SSPRCA2M big
Go to item page Right Arrow Icon of Right Arrow

Stinger Select Performance Series 2 Male to 1 Female RCA Y Interconnect

• Stinger Select
• Premium Coaxial Construction
• Gold Plated Ends
• 2 Male to 1 Female

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $9.00
-67% $2.99

Available

Ships in 10-14 days

• Stinger Select
• Premium Coaxial Construction
• Gold Plated Ends
• 2 Male to 1 Female

Stinger X12LINE

8" Universal RCA Male to Speaker Wire Adapter

X12LINE big
Go to item page Right Arrow Icon of Right Arrow

8" Universal RCA Male to Speaker Wire Adapter

• Universal RCA male to speaker wires adapter
• Eliminates need for line output converter
• Cable Length: 8"
• Color: Black

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $9.00
-11% $8.00

Available

Ships in 10-14 days

• Universal RCA male to speaker wires adapter
• Eliminates need for line output converter
• Cable Length: 8"
• Color: Black

Stinger XI32YF

X3 Series 2-Channel 2 Female/1 Male RCA Y-Connector Cable

XI32YF big
Go to item page Right Arrow Icon of Right Arrow

X3 Series 2-Channel 2 Female/1 Male RCA Y-Connector Cable

• 2-channel 2 female/1 male Y-connector cable
• Continuous connection construction (C3 Tech)
• Dynamic Signal Flow using OFC copper
• Noise shield directional construction
• Color: black and gold

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $8.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $109.00
-18% $89.00

Available

Ships in 10-14 days

• 2-channel 2 female/1 male Y-connector cable
• Continuous connection construction (C3 Tech)
• Dynamic Signal Flow using OFC copper
• Noise shield directional construction
• Color: black and gold

Kicker KIYFM (46KIYFM)

K-Series Y-Adapter Interconnect, RCA Male with Female Adapters; RoHS Compliant

KIYFM big
Go to item page Right Arrow Icon of Right Arrow

K-Series Y-Adapter Interconnect, RCA Male with Female Adapters; RoHS Compliant

• Kit includes 2 Y-cables (1 female/2 male) and 6 custom adapters (4 F/F and 2 M/M)
• Split-pin RCAs with silver-tinned, OFC wire for superior bass response and signal clarity
• The K-Grip dual-mold connectors offer sure grip and ergonomic shape for slip-free installation
• Ultra-slim for snag-free cable routing in tight places

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
$29.99

Available

Ships in 10-14 days

• Kit includes 2 Y-cables (1 female/2 male) and 6 custom adapters (4 F/F and 2 M/M)
• Split-pin RCAs with silver-tinned, OFC wire for superior bass response and signal clarity
• The K-Grip dual-mold connectors offer sure grip and ergonomic shape for slip-free installation
• Ultra-slim for snag-free cable routing in tight places

Wet Sounds WWX-RCA-6CH12FT-SHORT

12 Ft. 6-Channel Marine-Rated Wet Wire RCA Cable (Short Ends)

WWX-RCA-6CH12FT-SHORT big
Go to item page Right Arrow Icon of Right Arrow

12 Ft. 6-Channel Marine-Rated Wet Wire RCA Cable (Short Ends)

• 6-Channel RCA Interconnect Cables with Short Ends
• Fully-tinned Oxygen-free Copper core
• Quad-shielded design to eliminate interference
• Cable Length: 12 feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $68.99
-13% $59.99

Available

Ships in 10-14 days

• 6-Channel RCA Interconnect Cables with Short Ends
• Fully-tinned Oxygen-free Copper core
• Quad-shielded design to eliminate interference
• Cable Length: 12 feet

Stinger SI1215

15 Ft 1000 Series 2-Channel Audiophile Grade RCA Stereo Interconnect Cable

SI1215 big
Go to item page Right Arrow Icon of Right Arrow

15 Ft 1000 Series 2-Channel Audiophile Grade RCA Stereo Interconnect Cable

• 1000 Series 2-Channel RCA Stereo Interconnect Cable
• Audiophile Grade Performance
• Compact Molded Ends
• Heavy Gauge Conductors
• Molded Strain Reliefs
• ShocKrome Ends
• Cable Length: 15 Feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

4
List price $19.00
-58% $7.99

Available

Ships in 10-14 days

• 1000 Series 2-Channel RCA Stereo Interconnect Cable
• Audiophile Grade Performance
• Compact Molded Ends
• Heavy Gauge Conductors
• Molded Strain Reliefs
• ShocKrome Ends
• Cable Length: 15 Feet

Sundown Audio SB2RCA-20 (SB2CH20)

20 Ft 2-Channel 4 Male RCA Interconnect Cable

SB2CH20 big
Go to item page Right Arrow Icon of Right Arrow

20 Ft 2-Channel 4 Male RCA Interconnect Cable

• 2 RCA Interconnect Cable
• Includes 2 pairs of male RCA jacks
• Solid conductor signal wire
• Twisted pair design
• Color: Red
• Length: 20 feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $26.99
-17% $22.49

In stock

• 2 RCA Interconnect Cable
• Includes 2 pairs of male RCA jacks
• Solid conductor signal wire
• Twisted pair design
• Color: Red
• Length: 20 feet

Kicker KI44 (46KI44)

K-Series 2-Channel RCA Interconnect, 4m; RoHS Compliant

KI44 big
Go to item page Right Arrow Icon of Right Arrow

K-Series 2-Channel RCA Interconnect, 4m; RoHS Compliant

• Interconnect is Four Meters (13 Feet, 10 Inches) long
• Silver-tinned, OFC wire for superior signal clarity
• The K-Grip™ connectors offer sure grip and slip-free installation

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

17
$37.99

Available

Ships in 10-14 days

• Interconnect is Four Meters (13 Feet, 10 Inches) long
• Silver-tinned, OFC wire for superior signal clarity
• The K-Grip™ connectors offer sure grip and slip-free installation

Stinger XI326

6 ft. X3 Series 2-Channel RCA Interconnect Cable

XI326 big
Go to item page Right Arrow Icon of Right Arrow

6 ft. X3 Series 2-Channel RCA Interconnect Cable

• 2-channel RCA interconnect cable
• Continuous connection construction (C3 Tech)
• Dynamic Signal Flow using OFC copper
• Noise shield directional construction
• Color: black and gold
• Length: 6 feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $13.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $169.00
-18% $139.00

Available

Ships in 10-14 days

• 2-channel RCA interconnect cable
• Continuous connection construction (C3 Tech)
• Dynamic Signal Flow using OFC copper
• Noise shield directional construction
• Color: black and gold
• Length: 6 feet

Sundown Audio SAZ 2M-1F (SAZ2CHY)

Mono Channel SAZ Series 2 Male to 1 Female RCA Interconnect Splitter Cable

SAZ2CHY big
Go to item page Right Arrow Icon of Right Arrow

Mono Channel SAZ Series 2 Male to 1 Female RCA Interconnect Splitter Cable

• 1 RCA Y-Connector Cable
• Includes 2 male RCA and 1 female RCA jacks
• 100% Oxygen-Free Copper connectors
• Protective woven jacket minimizes friction for easy install
• Cable Length:
• Color:

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $23.99
-17% $19.99

In stock

Only 3 Left!

• 1 RCA Y-Connector Cable
• Includes 2 male RCA and 1 female RCA jacks
• 100% Oxygen-Free Copper connectors
• Protective woven jacket minimizes friction for easy install
• Cable Length:
• Color:

Items per page: 20 40 60

    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    FAQ for Universal-Fit Audio & Electronics in 2021 M8

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2021 BMW M8?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your M8.

    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    2006 Jeep Commander

    1999 Saturn SW1

    2021 BMW M8

    2022 BMW X6

    1985 Pontiac Formula

    2011 Audi S6

    2022 BMW X7

    2011 Hyundai Veracruz

    1987 Alfa Romeo Spider

    2008 Ford E Series

    Vehicle
    Store
    Delete

    2017 Harley Davidson FLHR Road King

    2011 Harley Davidson FLSTF Fat Boy

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon

    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.