For upgrading original PiMP to sequential (4 cyl only) or upgrading PiMPx to PiMPxs sequential (4, 6, or 8 cyl) EFI. This is a physical modification of your ECU's internal circuit boards to add sequential capability so it requires that you send in your ECU. 

Original PiMP Details:
-Original Pimp upgrade to allow for sequential fuel control on 4 cylinder engines for an original first generation PiMP ECU you already have and want to upgrade.
-Original PiMP upgrade can be for low impedance or high impedance injectors (4 cyl only). 
-Can only do sequential after the upgrade IF injectors are wired for sequential (Modified stock harness or our sequential PiMP harness for instance) and it has the ignition components to run sequential (Our CAS, or crank/cam triggers).

PiMPx Details:
-PiMPx upgrade makes it the same as a PiMPxs so it can still do batch fire but now can also do sequential fueling if injectors are wired for sequential (Stock V8 harness or our sequential harnesses for instance) and it has the ignition components to run sequential (V8 distributor, or Our CAS, or crank/cam triggers).
-PiMPx upgrade is for high impedance injectors only. 

Email Us for Return Instructions, DO NOT return without first emailing us as you'll send it to the wrong address.