Sky High Car Audio E-Series Big 3 Upgrade Kit 1/0 & 4 Gauge CCA Power Wire Alternator Battery Ground Wiring Kit (Red/Black)
Quick take
This Big 3 upgrade kit is built for car audio electrical upgrades, replacing critical alternator-to-battery and chassis ground connections with cut-to-fit CCA power/ground wire. It’s best for shoppers who want cleaner routing and pre-terminated ring terminals, with one main caveat: you need to choose the correct gauge (1/0 or 4 gauge) for your system and route the lengths accurately.
Pros and cons
Pros
- Includes three cables for the common Big 3 connections (alternator to battery, battery to chassis, and engine to chassis).
- Cut-to-fit design, so the end you trim matches your vehicle’s routing instead of guessing a fixed length.
- Oversized CCA wire (copper-clad aluminum) with ring terminals and heat shrink included for a more complete install.
- Multiple color options to help keep installs organized (red/black in this configuration).
Cons
- CCA wire is not the same as pure copper, so performance expectations should be aligned with your power needs.
- “Cut-to-fit” still requires you to measure carefully, and trimming mistakes can mean you need a new run.
- Buyer-review evidence in the dataset is limited, so broader performance patterns are hard to confirm.
What buyers think
Buyer-review evidence for this specific kit is limited, but the available feedback is positive and focuses on cable quality. Reviews mention the cables as “good” and “great quality,” with no recurring, product-specific complaints visible in the limited snippets provided.
How this Big 3 kit is meant to help
The “Big 3” upgrade targets the high-impact wiring paths in a vehicle’s charging and ground system. This kit is designed to cover three key connections: alternator to battery, battery to chassis, and engine to chassis. By improving the wiring and connection points in these areas, the goal is to support stronger electrical flow for car audio systems (especially when amplifiers increase current draw).
Key features to know before you buy
Choose the right gauge for your setup
The kit is offered in 1/0 gauge and 4 gauge options, with this listing configured for red/black color. Cable size matters because it needs to match your system demands and your intended performance targets.
CCA wire with ring terminals and heat shrink
The cable uses copper-clad aluminum (CCA), which is often selected for a practical balance of flexibility and cost. The kit also includes ring terminals and heat shrink, which can make it easier to complete terminations cleanly.
Cut-to-fit installation style
One end is pre-terminated while the other end is left open for trimming. That flexibility is useful for custom routing, but it also means you should measure twice and confirm lengths before trimming.
Compatibility and intended use
Designed for automotive wiring applications, with listing coverage that includes cars, trucks, SUVs, off-road vehicles, and other vehicle types. The kit is rated for 12V DC systems.
Pros and cons in real-world installation terms
When this kit makes sense
- You want a complete Big 3 set (not a single cable) so you can upgrade all three critical runs together.
- Your engine bay or chassis layout requires custom cable lengths, and you prefer trimming to fit.
- You value having ring terminals and heat shrink included, so you can focus on routing and correct terminations.
When you may want a different approach
- If your goal is maximum conductivity with pure copper, CCA may not align with your expectations.
- If you are not confident in measuring and trimming wiring accurately, fixed-length solutions (if available in your preferred material) may reduce installation risk.
Verdict: is it worth it?
The Sky High Car Audio E-Series Big 3 Upgrade Kit is a practical choice for shoppers who want a three-part Big 3 wiring upgrade with cut-to-fit flexibility, ring terminals, and heat shrink. It’s especially appealing if you’re comfortable measuring your routing lengths and you’ve selected the correct gauge for your system. The main limitation is material choice, since CCA is not pure copper, so make sure your performance expectations match what CCA-based Big 3 kits are typically used for.
FAQ
What does a Big 3 upgrade kit include?
A typical Big 3 kit includes wiring for the alternator to battery connection, plus two ground upgrades, commonly battery to chassis and engine to chassis. This kit is designed to cover those three runs.
Is copper-clad aluminum (CCA) good for car audio wiring?
CCA can be a cost and weight efficient option, and it’s commonly used in many car audio power wire kits. If you specifically want pure copper conductors for your build, you would likely look for a non-CCA alternative.
Does this kit require trimming?
Yes, it’s a cut-to-fit design. One end is pre-terminated, and the other end is open so you can trim to the length needed for your vehicle’s routing.
What gauge should I choose, 1/0 or 4 gauge?
Gauge selection should match your system’s power demands and your wiring plan. If you are unsure, review your amplifier current draw and the wiring recommendations for your specific setup.
What connections and terminals come included?
The kit includes a power wire and two ground wires, along with ring terminals and heat shrink to help complete terminations.
Is this kit only for cars?
It’s intended for automotive electrical wiring applications, with listing coverage that includes multiple vehicle types such as trucks, SUVs, and off-road vehicles.
Specifications
| Product Title | Sky High Car Audio E-Series Big 3 Upgrade Kit 1/0 & 4 Gauge CCA Power Wire Alternator Battery Ground Wiring Kit Multiple Colors (Red and Black, 4 Gauge E-Series) |
|---|---|
| Category | Electronics > Car & Vehicle Electronics > Vehicle Electronics Accessories > Installation Services |
| Brand | Sky High Car Audio |
| Manufacturer | Sky High Car Audio |
| Color | Red and Black |
| Connector Type | Ring Terminal |
| Cable Type | Component |
| Compatible Devices | Cars, Trucks, SUVs, Off-Road Vehicles, Marine Applications, Powersports vehicles |
| Other Special Features of the Product | High Speed |
| Connector Gender | Male-to-Female |
| Number of Pins | 3 |
| Maximum Voltage | 12 Volts (DC) |
| Recommended Uses For Product | Automotive |
| Item Shape | Round |
| Brand Name | Sky High Car Audio |
| Part Number | SHCA-ESBG3 |
| Included Components | 1x power wire, 2 x ground wire, terminls and heat shrink |
| Number of Items | 1 |
| Special Feature | High Speed |
Available variants
Color
- Blue and Black
- Red and Black
- Green and Black
Size
- 1/0 Gauge E-Series
- 4 Gauge E-Series
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