I have a 07 Si with just a short ram intake, I have no clue on wat kinda of exhaust to get for it. I don't know if I should go with the SKUNK2 Megapower RR (which is 70mm) or regular Megapower (which is 60mm), what would you guys recommend? Considering that I only have a short ram on it

 

i have the 60mm and it sounds great. I just need a skunk2 header. are you going to keep it all motor?

 

im debating on weather to get DC Sport headers or just keep it with the short ram....i know for a fact that the 70mm one works better with headers just cuz of the air flow and hp i believe..but im just curious if it'll slow the car down if i get the 70mm and not the headers...

 

DC race headers with buddy club pro spec...loud as F#^*

 

i have dc race headers on mine with hfp axle back and aem sri. if ur looking to keep low end torque and still gane power with the natural stock tone do tht same setup but with a megan 2.5 midpip. thts my current setup and its deeper free flowing and its a big notice of a gain. im just currently waiting my hondata flashpro

 

i hope you have a ecu reflash or flash pro, if not your gonna mess your motor up.

 

I have Greddy Ti-C and Strup Race Header. Sounds great.

 

Care to enlighten us on your reasoning??

 

if you want a loud *** exhaust and possibly tickets to go with it get a skunk2 in any size haha. I really do love the skunk2 exhaust systems, they're just far too loud to have in california...If only they would offer a quieter muffler, not some dumb n1 can.

But for me personally....full-race 3in ftw!! none of the 60mm on a k20 bullshet!

 

if you want to stay quiet...invidia or full race...if you want to be loud..skunk2 76mm

@macknjack how the **** would you mess up your motor? it's a god damn bolt on.

 

i personally do not have the dyno sheet to prove this but there are references on 8thcivic.com . when you add and intake and such to these cars it kills the air fuel ratio. when doing these mods it should in theory make the car run lean but the ecu has a fail safe so that it does not kill the car, it actually dumps and overload of fuel in the cylinders to cool them in turn making it run very rich. this will also foul your spark plugs.

i have noticed this decrease of gas milage first hand on my fa5. it runs like *** when it is driven cold at light throttle as well.

like i said i do not have the dyno sheet to back up these statements but go to a dedicated 06+ civic site and you will find plenty of information to help you out

 

What yo ument to say must have been...
So a friend of a friend told you this and You actually have no idea?

Let me clarify for you what truely happens straight from a Honda technician using the Honda computer software provided by Honda plugged directly into a 2008 Honda civic Si with headers, injen CAI, and full Pro spec exhaust...

Yes you are indeed correct that it does cause more air, which leans out the AF ratio from stock setting (which are rich to begin), However the ECU is designed to adjust on the fly, so it compensates by adding more fuel to the mixture. Thus creating a slightly more "rich" mixture...

However you comments of going to "mess up your motor" are so far from the truth. The difference is so miniscule it would never hurt a thing and second a rich running system is a more safe tune than a lean running system...Lean will get you horsepower, but it also causes more problems... the af ratio in the honda software reads out stock as 0.90-.915....after taking the reading on my car we were at 0.92-0.925...Lets just say it isn't going to "mess up my motor"

 

o so someone told you to huh? :flipoff:

 

I have this set up with my supercharger and it sounds like a beast!

 

nope did it myself...

 

I'm going to go out on a limb here, and say that I disagree with the positive reviews people have of the Skunk2 exhaust. I honestly don't care for the way it sounds. A guy that works accross the street from my place of business has it installed on his FG2 and he gets on it EVERYday leaving work. It is loud, but I personally don't care for the tone. It sounds very buzzy, like it's cheap. While I know its made well, I just don't think it's worth that kind of money for an exhaust system for the amount of noise it produces and the minimal amount of power gains it may produce.

I've always liked the A'PEXi WS2 system. Pretty polished finish, low tone but definitely audible above the stock system.

Just my $0.02