Holley Terminator X Engine Management Systems 550-1221

Holley Terminator X Engine Management Systems 550-1221

HLY-550-1221

Not Yet Reviewed

Part Number: HLY-550-1221

Estimated Ship Date from Texas: Monday 10/26/2026

$2,049.95

Results 1 - 6 of 6

Fuel Filter, Pressure Regulator, Inline, 58 psi, 5 Micron, Fuel Injection, Chevy, LS, 5.7L, Corvette, Each

Part Number: SUM-230150

3.72 out of 5 stars ( 18 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 10/26/2026 if shipped by air

Harness Adaptors, Holley EFI, LS3 MAP Sensor Adapter, Plug-and-Play, Pre-Terminated, Adapts to LS1/LS2 Engine, Chevy, 5.7L, 6.0L, Each

Part Number: HLY-558-416

4.85 out of 5 stars ( 20 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 10/26/2026 if shipped by air

Fuel Filter Pressure Regulator, LS, Inline, Steel, Natural, 5 micron Filter, Chevy, 5.7L LS, Each

Part Number: TNK-LS9904

4.08 out of 5 stars ( 25 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 10/26/2026 if shipped by air

Map Sensor Adapter, Convert LS1/LS2 Map Sensor to LS3 Sensor, Harness Adapter, Chevrolet V8, Each

Part Number: SUM-890133

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 10/26/2026 if shipped by air

Adapter Harnesses, Holley EFI, MAP Sensor Adapter, MPFI Weatherpack 2-pin to 3-pin Delphi GT Connector, Plug-and-Play, LS Engine Harness, Each

Part Number: HLY-558-466

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 10/26/2026 if shipped by air

Map Sensor Adapter, Convert LS1/LS2 Map Sensor to LS3 Sensor, Harness Adapter, Chevy, LS, Each

Part Number: TSN-81033

Not Yet Reviewed

Estimated Ship Date: Monday 10/26/2026 if shipped by air

...Loading

Estimated Ship Date: Monday 10/26/2026 if shipped by air

  • 1
  • Page 1 of 1
Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.