I can't personally tell you an answer since I'm new to the nitrous as well. I can tell you that just like with anything from anyone you should not buy based solely on price.
IMO call the sellers up to see what kind of response to questions you get on the phone and realize that when something is being sold sales people generally will tell you what you want to hear. Maybe also send a couple of emails to the different companies pretending to be a customer with a kit already in hand but with a question or concern and see what kind of response you get..........this may clue you in to who has best or better after sales support.
If you can generally figure things out on you're own then buy based on price or features and eliminate support from the equation.
Modern sells the NX kits and modern has been great for sales and support on here.
modern sells the NX kit, as you probably know, they are one of the best vendors on this forum. They are not cheap tho!!! I'm sure you can beat moderns price.
I personally like www.nitrousoutlet.com They are not the cheapest you will find but man, their shipping is lighting fast!!!
AGP3147 TO COME SOON,QW BFMIC,Atp hard pipes,HKS bov,2.5 in maxfab dp without cat,greddy evo2 catback stage2,many other mods to come
FORSALE:Boomba STS & 8 stage2 injectors
Ive had great customer service from Dynotune and run a few of there products. Give them a call and tell them what you are doing and they will help.
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S1, S2 WGA, wheels and tires, AGP Dog Bones, H-brace and traction bars, SRI,Ebay intercooler, 3" O2, Max Fab W/cat, custom Mopar/Borla, LM-1, and a little laughing gas 359hp and 440tq. Nitrous! my cure for depresion.
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