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I bought my Cobalt LS 5-Speed my junior year of Highschool for $10,500 with 15,000 miles on it in in 2008. It wasn't long and I had a cold air intake and a cat-back exhaust. These are the only mods I had done to it until 2015 because I didn't really have spare money in college. June 2015 I decided I wanted to give this girl some power and I also wanted to keep the outside looking bone stock for the sleeper effect. So I started of with an M62 supercharger kit from ZZP. I ran this blower with a 3.1" pulley and about 10-11 pounds of boost on stock internals for about 6 months. I was still getting the bugs worked out on the tune when a Harrop HTV1320 supercharger came up for sale from someone I know. So I bought it. In order to get any additional power from the larger 1.6 liter blower I had to install forged rods and pistons. While I was at it I went ahead and replaced the con-rod bearings with Clevite rod bearings and installed stiffer valve springs from ZZP. After the install was all said and I was dialing in the tune on 91 octane (it is the only thing available in my area) I had pinging. I always feel like knocking the ignition timing down to fix pinging is like giving up free power so I installed a Devil'sOwn water/methanol injection kit with a progressive controller. Now that I have everything tuned up she is running like a true sleeper. No one expects a Cobalt with steel wheels to be fast.
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