Hi, i want to make the upper peice myself. Ok i want to know how poeple make the holes for the hoses? Drill? OR did you guys cut it by hobby knife. Wat size drills for the holes if you used drills. How did you attach the nipple? just stick it in. And for the brass barb? Also wat sizes for the hoses should i get? Thanks for any help.. I want to do these, want the extra noise. And is this safe for my engine? WOuld the pipe mess up my car some how? Thanks

 

http://forums.maxima.org/showthread.php?threadid=125356

Please be more descriptive in your title, thanks.