he has a 07 civic coupe EX stick shift (https://www.hondacivicforum.com/m_51.../tm.htm#516236)

 

The dyno charts I've seen for true cold air intakes on a Civic show about 5-10 HP at very high rpms. I've always advocated opening up the front (intake) and back (exhaust) to get the most high-rpm power from a stock engine. And I don't mean installing 3-inch pipe all the way back, just a CAI and a catback and you'll feel the high-end grunt.

 

so i dont have to worry about driving in rain??????????????????????

 

Just don't drive through huge puddles going fast and you will be fine.

 

If you MAY drive through deep puddles, you can always add this to your intake:

http://www.tirerack.com/intake/aem/air_bypass_valve.jsp

 

^ a bypass valve completely eliminates any power you may have gotten by installing the intake. if you're getting a bypass valve, you're better off keeping the stock air box.

 

that by pass valve looks pretty legit. i think i might get one. got mine wet once at the car wash by accident and it sucked.... talk about shuddering. hope it didn't mess up anything because i only drove one mile then left my hood open so the sun would dry it out!

 

^ i find that so hard to believe. i've driven through a flood and my engine hasn't stuttered...

in order to hydrolock an engine, you literally have to SUBMERGE the intake in water. splashing it won't kill it. if you're worried about getting splashes on it, get a damn water guard! a BPV is just a plain waste of money... kills whatever gains you got from the intake, and you spend more money to revert to the performance of a stock airbox. Might as well have stuck with your stock box.

 

The bypass valve is not a complete flop... it does take away minimal amounts of power, but they are just that...MINIMAL. As far as saving your intake from sucking up water, they work. So, if it rains alot where you live, get one.

 

just get a heatshield and position it towards whatever way you think water is going to splash up from.....no loss in gains, but you're still out of luck if you like driving through lakes