here's someone who's engine got fawked up, rod punched a hole in the block. I wasn't driving, my bro was. cost me 1500 to replace the engine, luckily insurance covered some. HOWEVER!!!!, i did NOT have the fender lining in place, which is why it got hydrolocked. So if you have a fender lining in place, then you won't really hafta worry. But make sure you pay attention to that damned fender lining, cuz when u install that cai, and you go through the fender lining, chances are some of those clips are gonna break, and chances are you're gonna be lazy and say ehh..couple clips here and there won't matter. Then one day it's gonna rip off, and once again you'll be lazy, and say..ehhh....it's not raining yet...no worries. At least das how i was, and when it finally started raining, i was away at school, and my bro was driving my car for awhile...and whaddaya know..i totally forgot bout the fender lining, and he drove through an unavoidable puddle. So just a few words of caution, you will be fine without a bypass, but make sure you take the precautions.