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550-500 HP UNIVERSAL RETROFIT KIT FOR 4150 INTAKES
550-501 HP UNIVERSAL RETROFIT KIT FOR 4500 INTAKES
550-601 HP ECU AND HARNESS FOR TPI & STEALTH RAM
550-601N HP ECU AND HARNESS, TPI/HSR, NTK
550-602 Holley HP ECU and Harness for LS1 and LS6
550-602N HP ECU and Harness Kit For GM LS1, NTK
550-603 HP ECU/Harness, LS2, LS3, LS7, USCAR/EV6
550-603N HP ECU Kit GM LS2/LS3 Engines W/58x Crank
550-604 HP EFI ECU & Universal V8 MPFI Harness
550-604N HP EFI ECU Kit, Universal V8 MPFI Fit NTK
550-605 HP EFI ECU & Unterminated Universal Harnes
550-605N HP EFI ECU Univ Unterminated Harness, NTK
550-606 Holley HP ECU & Harness Kit
550-606N Holley HP ECU & Harness Kit
550-607 HP EFI ECU & Harness for GM LS2/LS3/LS7
550-607N HP EFI ECU & Harness GM LS2/LS3/LS7, NTK
550-616 HP EFI ECU & Harness (99-04 Ford) 2 Valve
550-616N HP ECU & Harness (99-04 Ford) 2 Valve NTK
550-617 HP EFI ECU & Harness (99-04 Ford) 4 Valve
550-617N HP ECU & Harness (99-04 Ford) 4 Valve NTK