RV6 2012+ Civic Si Bellmouth Downpipe

Sweet brotha! I think we have the same setup as far as mods (injen intake and exhaust)....I am eagerly anticipating your opinion on the downpipe!
 
Well I finally got the RV6 downpipe around 2:30, installed it and took it for a spin a little bit ago. I could tell a difference right when starting up the car how much more exhaust flow there was. I knew it was gonna be loud, but it isn't that bad when cruising which is good. As Eddie mentioned I just have the Injen CAI and axle back muffler. I am glad to say there is no rasp at all with the catless downpipe which is something I was afraid of. It does have that sort of exhaust leak sound that others have mentioned but there is no leaks just a lot of smelly exhaust flow!!! You can feel the difference at all rpms, especially torque wise. Overall I'm very satisfied with the quality of the RV6 dp, fitment was perfect and came with everything (and more) needed! I'd definately recommend it to anyone! I'll try to get a video up this weekend.
 
One thing I should mention to those of you who are gonna install the dp yourself, you will need to have an 02 sensor socket to get the primary (top) sensor out. Honda put an aluminum cup around the base of the sensor so you cannot put a 7/8" wrench on it. Also I have a Matco 02 sensor socket and it was too thick to even fit inside the cup so I had to grind down the outside of the socket to get it in there. Other than that just take all the heatshields off the stock dp, unbolt the secondary 02 sensor wire harness bracket on the firewall, and unbolting the the b pipe heatshield gives you enough room to get that sucker out of there. You have to twist it out of there in the right direction, will take you a few min to figure it out.
 
FXRob said:
One thing I should mention to those of you who are gonna install the dp yourself, you will need to have an 02 sensor socket to get the primary (top) sensor out. Honda put an aluminum cup around the base of the sensor so you cannot put a 7/8" wrench on it. Also I have a Matco 02 sensor socket and it was too thick to even fit inside the cup so I had to grind down the outside of the socket to get it in there. Other than that just take all the heatshields off the stock dp, unbolt the secondary 02 sensor wire harness bracket on the firewall, and unbolting the the b pipe heatshield gives you enough room to get that sucker out of there. You have to twist it out of there in the right direction, will take you a few min to figure it out.
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You didn't have to take off the coweling? I have read and seen pics that you have to remove that stuff too?
 
RR'12SiCp said:
You didn't have to take off the coweling? I have read and seen pics that you have to remove that stuff too?
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Yes you do in order to get to the top bolts/heat shield. I was just highlighting what I thought were the more important parts and maybe stuff that hasn't been mentioned before.
 
spdandpwr said:
Actually, no...

12-Civic-HeaderDyno.jpg


The UR loses quite a bit of torque to the stock car below 2700 rpm...that's something you CAN feel in daily driving (I know I shift before 2700 rpm). Also, UR made the 11 lbft of torque gain with the addition of a 3" exhaust. These guys made it with the stock exhaust. Imagine how much more torque you'd get with the addition of an exhaust?
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You're comparing a 2.5" downpipe to a 3" downpipe + 3" exhaust. You think the low end isn't going to suffer? Without the ability to tune, it's a pointless comparison.
 
Well, at present, since we all can't tune the caparison is still holds water. In the future, when we can tune, the caparison will be pointless. I guess we shall see what happens after some proper tuning, though I'm not sure it'll help with torque that low in the rpm range. Only time will tell.
 
I can't wait to see some better numbers out of these cars, i think the downpipe coupled with exhaust is going to help you guys tremendously.

right now, my freakin 8thgen with bolt-ons makes more average torque than the k24z7 does.
 
yet there are a number of people who run a 3" catback exhaust
 
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