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⚡ Wire your LS swap like a pro — power, control, and diagnostics in one sleek harness!
The BP Automotive LS Swap Standalone Wiring Harness by Michigan Motorsports is a premium, plug-and-play wiring solution designed to run LS engines independently from factory wiring. Featuring an integrated fuse block and relay system, OBD2 diagnostic port, and fan control wiring, it supports a wide range of LS engines (4.8L to 6.2L, including LS1 through LS6). Ideal for professional LS swaps and custom builds, this harness delivers clean installation, reliable power management, and easy tuning access.
| ASIN | B07KRNK62Q |
| Best Sellers Rank | #997,539 in Automotive ( See Top 100 in Automotive ) #5,406 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | Michigan Motorsports |
| Brand Name | Michigan Motorsports |
| Cable Type | Custom |
| Connector Type | 16-pin Obd2 |
| Customer Reviews | 4.6 out of 5 stars 30 Reviews |
| Included Components | (1) BP Automotive Standalone LS Swap Harness |
| Manufacturer | Michigan Motorsports |
| Material | Polycarbonate (PC) |
| Material Type | Polycarbonate (PC) |
| Model | B4100 |
| Number of Items | 1 |
| Part Interchange Info | LT1, LS1, LM7, LR4, LQ9, LQ4, 4.8, 5.3, 5.7, 6.0,, OBD2, LT1, LS1, LM7, LR4, LQ9, LQ4, 4.8, 5.3, 5.7, 6.0 |
| Part Number | B4100 |
| Unit Count | 1.0 Count |
| Warranty Description | 30 Days |
O**A
Quality product!
Great product for a great price!
M**6
very good product!!!
this is by far the best fuze block for your LS Swap. even though it is not labeled, which would make it 10x better; this is the best on the market. hands down. seen a guy leave a review about it not operatiing the fans, he doesnt know what he is doing, my work perfect!!!! you better buy one before the price goes up cause these are phenomenal. I have another one on the way cause i know ill be building another truck.
Z**H
Great fuse and relay block for LS swap!
Well thought out circuit design with good instructions. The wires are nice and long to minimize needing to splice in extra length. Convenient mounting holes for easy installing options. The obd2 connector has convenient mounting holes and works as it should. It comes pre wired for serial data and can.
V**O
Keeps the fans running even w key off if uses external temp control
Not a good design for the cooling fans. This design has the relays for the fans waiting for a ground to activate. Usually controlled by the PCM. HOWEVER, you have have a thermostatic switch control it (for example a switch in the head or radiator) it will ground out when it gets to the temp (190* for example) and it opens back up around 180*. So even if you turn the car off, the fans will keep running if that switch is closed. This will kill your battery. Other relay boxes I’ve used only have power to the fan relays when the key is on. If they included a wiring diagram, I could re-wire this so it works correctly but it doesn’t come with a wiring diagram. Quality is good but this flaw is what keeps it from getting 5 stars
J**T
Good quality fuse block
Nice fuse block very well made
Trustpilot
1 week ago
2 weeks ago