We believe high performance starts with precision electricals. This kit is built exclusively for the Holley ECU'S—no compromises with Casper's Electronics.
Kit includes the following:
New 86/87 GN Holley Engine Harness (Plugs directly into Holley Dominator, Terminator, Terminator X MAX, and HP.)
Key Reason to Purchase: If your car works perfectly some days, and then acts weird the next day, you're likely fighting an intermittent electrical issue. This product will resolve your issue.
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Holley Dominator ECU
The brain of the system. Designed for maximum control, data capability, and performance tuning.
Key Reason to Purchase:
Elite-level engine management. Full control over fueling, ignition timing, boost control, safety strategies, and data logging.
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Individual Smart Coils, Stock Location Mounting Bracket, and Custom Spark Plug Wires
Key Reason to Purchase: No more ignition breakup. Clean pulls every time. Optimized length and fit spark plug wires—delivering precision spark.
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EV6 Injector Harness
Key Reason to Purchase:
Key Reason to Purchase:
Seamless injector control—no compatibility worries and no splicing required.
Why We Chose EV6:
At Watts Performance, we focus on solutions that deliver the most reliable performance long-term. The EV6 connector has become the modern standard for high-performance injectors because it provides a more secure electrical connection and broader compatibility with today’s injector options.
By building the system around EV6, we’re able to offer customers the best injector flexibility and reliability available without requiring adapters or custom wiring.
Simply put—we chose EV6 because it’s the best injector platform moving forward.
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170-Amp Alternator
Key Reason to Purchase: High output to handle ECU system needs—charging stays strong, even at idle.
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Positive & Negative Battery Cables
Key Reason to Purchase: Fresh cables ensure clean power delivery—no hidden corrosion.
Grounding Block + Ground Strap Kit
Key Reason to Purchase: Easy firewall mounting—stable grounds for a noise-free system.
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