Engine Management

MAXXECU RACE Premium
$2,090.00
/

BMW BSD communication board
$70.00
/

MAXXECU PRO Premium
$3,455.00
/
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Holley Terminator X Max vs. MaxxECU vs. Haltech Rebel: Which Standalone ECU is Right for Your LS-Swapped BMW?
Holley Terminator X Max vs. MaxxECU vs. Haltech Rebel: Which Standalone ECU is Right for Your LS-Swapped BMW? When performing an LS swap on your BMW E9X, selecting the right...