Ok guys quick question i have a Chaser series motor, soarer harness done by tweak, and i have both of these ECU's both have ran my car the question now is i have them both laying here and they are the same but the casing is a bit longer on one. please take a look and see if you know if theres any difference. thanks so much guys.

 

probably one is manual and the other Auto, Ill keep the auto and cut the speed sending cables so you don't have the annoying speed cut

 

there is no difference between the two...they both look auto, so they both will work...even if ur car is a manual, u can use a auto ecu, but u cannot use a manual ecu with a auto tranny...use one and keep the other as a spare, trust me they come in handy.