What are these things?
It is usually used for race only but you can put filters on them and drive them on the street. http://www.homemadeturbo.com/tech_pr...itb/index.htmlHere you go.
really hard to say...you would not want to do that until you have a new cam and maybe even some head work. Plus unless you build them yourself they're really expensive, like 2000+. So I wouldn't recommend them unless you have all the following.
yeah, unless you go some serious cash dont worry about it. But, i will tell you this, they sound SICK on a daily driver. Ive seen/head at the track, they just filter them and they sound freaking wicked
Oh I have no intentions of buying this... I just like to know what things are and how much they cost... are those things available for a k series? And those would work if you boosted a k20?



