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Welcome and congrats on your new ride....You'll have to post some pics. They are both reputable shops with a lot of knowledge and great prices. I honestly would go with Jannetty, which is who I'm sticking with now. When you buy your parts from him he will send you a free custom tune for those upgrades, if you have a SCT device. He will also do HP Tuners but you have to pay for a license and you have to buy the software, which is $500 for the standard and $650 for the pro version. You can buy a SCT X4 or iTSX tuner, which will work with the ZL1 and is less money. I have the iTSX personally. I like it because I can use my iPhone or iPad for tuning and you can display gauges on it. For a first mod, I would suggest a Roto-Fab intake. You will notice a difference and you will here the blower whine, which makes it worth the money in my opinion. Anyway....good luck and happy modding!!!
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2015 ZL1 A6 Coupe Crystal Red
ATI Balancer w/9.55 (22.5%) lower pulley, FIC1000 Injectors, Stainless Works 2" headers, Stainless Works Retro Cat-Back, V-Max Ported TB, Roto-Fab w/Big Gulp, Elite 2nd Gen Catch Can, Jannetty Tuned. 581 rwhp
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