ok picture yourself standing in front of the car looking at the engine...now lok to the back left and follow a thick group of wires (wrapped) that runs from just under the left wiper (still looking from front) and runs along the upper left side of the engine compartment...it splits a little before the fenderwell hole for my intake...i recently fryd a small grey box filled with some kinda electrical stuff that was attached to the end of this wire...can anyone tell me what it was...what it did...and if i need it...thanks alot!!! ........also, why would my stock motor with headers offroad x and catback ...backfire after i give it alitlle gas...it happens all the time...thanks again