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Chevrolet Cobalt Modifications
In my opinion the performance upgrade so dramatically increased the performance of this coupe that a person who is purchasing the SS Supercharged would be absolutely CRAZY not to go to the internet and purchase everything at quite a savings and then make an appointment with your Chevy dealer to install the kit and exhaust system for $400 to $500 dollars. Boardwalk Chevrolet installed mine, and I purchased the items on crateenginedepot.com for about $800 dollars. Total price with install was under $1,300!
The difference? Outrageous increased acceleration, intensely tall gears in 2nd, 3rd, 4th, and 5th, and lots of horses in all 5 gears. The comparison to the version without the Stage 2 kit and Cat Back exhausts? Basic performance with horses in 1st and 2nd, kinda in 3rd, nothing in 4th and 5th. You should shoot yourself in the head if you don't upgrade for a reasonable $1,300! And, best of all, you keep your Chevy warranty because it's a real live SS performance option, at an air conditioning level. Also, no need to report it to your car insurance even though you've stepped up to a true muscle car with the upgrade.
Lastly, I will let you know the Cat Backs are headers with a couple of miniature glass pack like mufflers and they sound like a funny car if you punch the accelerator, and sound just like a Dodge Viper on the highway when you drop the clutch into 2nd or 3rd and step on it. I also blew the doors off of a 330 hp sports coupe and I won't mention what kind of car it was, but they were shocked that I could downshift into 3rd and hit 120 mph easily going into 4th.
So, I'd highly recommend the Stage 2 kit with Cat Back exhausts and remember that Chevy racing technology means a lighter car - you on average are driving a car that is up to 1,000 pounds lighter than most sport coupes, and be sure to subtract the weight of a heavy metal muffler exhaust system v. a lightweight Cat Back performance exhaust - with the power to weight ratio of a Cobalt to other sport coupes, not the dry hp ratings on a block of wood, you definitely are then driving a car that competes with Mustang GTs and up and feels like 330 hp at least. I'm very serious and not pulling your leg - I've had very fast cars in the past and know my horsepower ratings!
Lastly, what about durability. After 5,000 miles, I experienced the joy of taking my car in for an oil change - Putnam Chevrolet, one of the best shops in the United States, pointed out that because the racing fuel injection system is in the way of the oil filter, they have to lift it, flush it, and then put it back, and of course that protects your purchase! And, right back to the first day you had the performance upgrade you go, you can tell the car likes that. So, no problems whatsoever, you do get to put your foot into it, you do get to downshift, but of course like any sports car you have to be somewhat reasonable, but no problems whatsoever after 5,000 miles. I consider this upgrade VERY reliable!!!