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EFI Wiring Specialist

At SMI, we specialize in professional EFI wiring solutions. From custom harnesses to one-of-a-kind electronic modules.

Lifetime Warranty MAP Sensors

  • Potted 3 Bar MAP Sensor GEN 3 TRUCK STYLE - LQ4 LQ9 L33 LM4 LM7 L59 LR4
    Regular price
    $49.99
    Sale price
    $49.99
    Regular price
    $59.99
    Unit price
    per 
    Sold out
  • Potted 4 Bar MAP Sensor GEN 4 LS - LS3 LS9 LSA Holley Intakes
    Regular price
    $49.99
    Sale price
    $49.99
    Regular price
    $59.99
    Unit price
    per 
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  • Potted 3 Bar MAP Sensor GEN 3 CAR STYLE - LS1 LS2 LS6 LS7
    Regular price
    $49.99
    Sale price
    $49.99
    Regular price
    $59.99
    Unit price
    per 
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Holley Terminator X Systems

  • Holley EFI CAN TO USB DONGLE - COMMUNICATION CABLE/ Tuning Cable 558-443
    Regular price
    $62.54
    Sale price
    $62.54
    Regular price
    $69.49
    Unit price
    per 
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  • Holley EFI TERMINATOR X 24X/1X MULTEC 2 LS MPFI KIT 550-904
    Regular price
    $1,124.95
    Sale price
    $1,124.95
    Regular price
    $1,250.00
    Unit price
    per 
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  • HOLLEY HP BILLET EFI BY PASS FUEL PRESSURE REGULATOR
    Regular price
    $205.95
    Sale price
    $205.95
    Regular price
    Unit price
    per 
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  • Holley EFI TERMINATOR X MAX 24X/1X EV1 LS MPFI KIT WITH TRANSMISSION CONTROL 550-916
    Regular price
    $1,462.95
    Sale price
    $1,462.95
    Regular price
    $1,626.00
    Unit price
    per 
    Sold out

YES, WE HAVE HOLLEY CAN SPLITTERS

We have tons of Holley EFI CAN splitters in stock, and more being made every day!

Buy here

7" Digital Dash Fuel Level Harness

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Holley EFI CAN Connectors available!!

Visit our store listing

GM Alternator Information!!!

Read it here!