28 in stock in Corona · free shipping
Standalone ECUs
Holley, Haltech, Link and Emtron engine management from an authorised dealer that also installs it, wires it and tunes it on a hub dyno. Advertised prices, in stock, free shipping in the continental US.
7 in stock · from $1,449.95
Holley
The most popular way to run an LS or LT swap: complete kits with the harness, wideband and handheld in the box, up to the Dominator for race cars.
Holley · 550-910T
Holley Terminator X 550-910T
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,449.95
Holley · 550-903
Holley Terminator X LS1/LS6 24x kit
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,599.95
Holley · 550-933
Holley Terminator X Max LS 58x DBW kit
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,999.95
Holley · 550-927
Holley Terminator X Max Gen III truck + trans kit
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,199.95
Holley · 554-114
Holley Dominator EFI ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,499.95
Holley · 550-1610
Holley Terminator X Max Gen V LT DI kit, early
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$3,299.95
Holley · 550-1611
Holley Terminator X Max Gen V LT DI kit, late
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$3,299.95
8 in stock · from $1,695
Haltech
From the Nexus Rebel LS kits to the Nexus R5 vehicle control unit, which replaces the ECU, power distribution and data logger in one box.
Haltech · HT-220204
Haltech Nexus Rebel LS kit, Gen IV DBW
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,695
Haltech · HT-220201
Haltech Nexus Rebel LS kit, Gen III cable
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,695
Haltech · HT-151300
Haltech Elite 2500 ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,995
Haltech · HT-213000
Haltech Nexus S3 ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,265
Haltech · HT-193000
Haltech Nexus R3 VCU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,585
Haltech · HT-151366
Haltech Elite 2500 Gen IV LS DBW kit
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,629
Haltech · HT-195000
Haltech Nexus R5 VCU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$4,415
Haltech · HT-195405
Haltech Nexus R5 + LS DBW harness kit
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$5,965
8 in stock · from $2,045
Link ECU
Wire-in G4X and G5 units, and plug-in ECUs that bolt into the factory harness on the Nissan and Toyota platforms drift and track cars are built on.
Link ECU · 210-4000
Link 350ZLink 350Z/G35 plug-in
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,045
Link ECU · 211-4000
Link SupraLink 2JZ plug-in
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,145
Link ECU · 109-4000
Link G4X XtremeX wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,195
Link ECU · 122-4000
Link G4X FuryX wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,195
Link ECU · 214-4100
Link GTRLink Skyline GT-R plug-in
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,275
Link ECU · 217-4100
Link S15Link SR20 plug-in
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$2,275
Link ECU · 156-5000
Link G5 Voodoo Neo 6 ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$3,255
Link ECU · 153-5000
Link G5 Voodoo Pro ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$4,065
5 in stock · from $1,700
Emtron
Professional motorsport engine management: the compact SL range and the KV8, KV12 and KV16 for V8s, staged injection and big-power builds.
Emtron · 1912-042
Emtron SL4 wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,700
Emtron · 1912-082-1
Emtron SL6 wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$1,850
Emtron · 1122-082
Emtron KV8 wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$3,200
Emtron · 1122-122
Emtron KV12 wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$3,600
Emtron · 1122-162
Emtron KV16 wire-in ECU
In stock in Corona. Free shipping in the continental US, or collect it at the shop.
$4,080
Before you order
Choosing a standalone ECU
- Plug-in, wire-in or a kit — which do I need?
- A plug-in replaces the factory ECU on a specific car and uses its harness, so nothing is rewired. A kit (Holley Terminator X, Haltech Rebel LS) is an ECU with an engine harness already built for one engine family — the usual way to do an LS or LT swap. A wire-in unit is the ECU alone; it needs a harness built or bought for the car, and suits race cars and unusual combinations. If you are not sure, call — that conversation is free, and a wrong unit is not returnable.
- Are these the same prices other dealers charge?
- Yes. DEFI is an authorised dealer for Holley, Haltech, Link ECU and Emtron, and every unit here is at the price authorised dealers advertise. Shipping in the continental US is free on top of that.
- Do you have them in stock?
- Yes — they ship from Corona, CA. Free in the continental US; Alaska and Hawaii are quoted by phone. You can also collect from the shop.
- Can you install and tune it?
- Yes. We install, wire and calibrate standalone engine management and tune it on our Mainline ProHub hub dyno, with the full sheet at the end. Shop labor is $265 an hour, quoted against your car.
- Are standalone ECUs street legal?
- No. None of these carries a CARB Executive Order. They are competition engine management: not legal on a pollution-controlled vehicle in California, and a car running one will not pass a smog inspection.
- Can I return one?
- No. There are no returns or exchanges on third-party hardware once it ships — the manufacturer’s warranty is the warranty. Ask us about fitment before you order.