No, they do not work.
Typically their function is to keep the car in open loop warm-up longer. resulting in higher injector duty cycles after warm-up; this may or may not have been useful for earlier model EFI cars, but for ours, definitely not worth it.
Get an Uprev tune or sprintbooster instead.
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Enjoy it. Destroy it.
Last edited by Jordo!; 02-23-2014 at 03:12 PM.
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