What is changed in new 4L 20 engine to make it 20E low emisions engine? Is it something like a different cam or is it something I could change to regain the power eg a computer chip?
TIA
What is changed in new 4L 20 engine to make it 20E low emisions engine? Is it something like a different cam or is it something I could change to regain the power eg a computer chip?
TIA
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