I have a 2007 Chevy Colorado with the 3.7l inline 5, and I want to do some cheap performance boosting upgrades if I can, any advice on how to increase hp, mpg or otherwise? They also need to be california legal unfortunately.
S4lskelt
In all honesty, leave it alone or buy a different vehicle. There are barely any upgrades available for 1st Gen's and even less are CARB approved. You are not going to get any sort of noticable improvement no matter what you do.
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