take a look at these numbers from AEM.Matrix XR (Base Vibe) with Cold Air:
http://aempower.com/pdf/dyno/2...S.pdf Matrix XR (Base Vibe) with Short Ram:
http://aempower.com/pdf/dyno/2...S.pdf Matrix XRS (Vibe GT)with Cold Air:
http://aempower.com/pdf/dyno/2...S.pdfMatrix XRS (Vibe GT) with Short Ram:
http://aempower.com/pdf/dyno/2...S.pdf the number speak for themselves. As far as the quality of the intake posted, well, to each his own, but, I wouldn't buy it. You can get a CARB certification sticker with true "Big Name" manufacturers. Try to get that from the producer of the intake you are referring to. Won't happen! The big companies put time and effort into gettinf the most out of the product they produce. They put countless hours/ dyno runs into making the piece preform.You get what you pay for.Save for either an AEM, Injen, or TRD CAI (Cold Air Intake). As far as the modules on ebay.....well, in the nicest term I can think of...They're ****!...It's a scam!You can also go with a set of ground wires. Check out
http://matrixowners.com. Search for ground wires and you get all the info you need on the topic! PoweredByRice makes/sells them. They're a good quality product for $50. Sparkplugs may smooth out your idle, but performance gains will be minimal.The CAI should give you the added kick and growl you're looking for. Definitley go for this mod first. Installation takes no more than 1.5 hrs with basic tools and common knowledge of how to read/follow directions. Just walk through them first and identify everything before you start removing things!If you've got any other questions, feel free to ask! And welcome to genvibe.com!