Side effects? More Horse power and beter gas mileage. As for those lines, Shold be one off your CCV and one to something in the rear of the engine. I made my tube out of PVC pipe, all I did was drill holes in it and shove the tubes in the holes and sealed it up. Works great for me. I should have pics up soon so you can see it.
My 92 YJ
Clarion BD216, RF 200aIV, Clarion APA2030, RF HE2 12's, Rf 4x6's, RF 1" Tweets, Eclipse EUU-1300, Aura Bass Shakers Security: Clifford Power: Optima Yellow top,Thrush turbo 2 1/2" Exhaust, Radio Shack Sport CB, 102" whip antenna, Dual tips on Exhaust, K&N custom intake, KC Lightbar, 4 KC Daylighters.
Scored a 139 on the Jeep Rater.