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  1. For Sale Section
    Catless downpipe for 9th gen si. Had to get the pipe welded with a new flex pipe. It will fit on your 9th gen ONLY if you have a catback for our platform. The elbow you see on the side is a defouler for the O2 sensor. It tricks the computer into thinking there’s cats and will help you pass...
  2. For Sale Section
    Hello all, I'm parting out my 2014 Si (sedan) and posting those parts here for sale. All of them were bought new, properly installed, and used for 4 years without a single issue. The lists and pictures are shown below along with selling prices. Preferred for local pick up in New Jersey and New...
  3. Exhausts and Downpipes
    I recently ordered the skunk2 downpipe for my 2015 si but the rest of my car is stock, I’m not sure if I have to wait until I can afford the skunk2 exhaust and hondata before I install or if I can get a tune somewhere without hondata. (Sorry if it’s an obvious answer I’m new to all of this)...
  4. Downpipes and Exhausts
    QUESTION: I have yet to find a definitive answer to this... I am buying a used RV6 catted downpipe, without the hardware. Do I have to order the particular RV6 hardware from their site (12-15 Civic SI Bellmouth Downpipe Hardware Kit), or can I buy new OEM gaskets? I've heard that the OEM...
  5. For Sale Section
    Hey Everyone, I will soon have available all of the items mentioned in the title of the post: Progress Adjustable Sway Bar, Hondata Flashpro w/ Bluetooth, RV6 Catted Downpipe, PRL RBC Adapter Kit and a Skunk2 Cold Air Intake. The parts are coming off of a car that has 43,000 miles on it...
  6. Exhausts and Downpipes
    Hey there you guys I have a 2012 Si Coupe and the guy before me had put on a 3” PLM catless downpipe and a Full Race cat back also a 3”. The downpipe now has a mean crack in it, is throwing a lean fuel mixture/O2 Sensor cel, and needs to be replaced. I’ve been dealing with the smell (amplified...
  7. Wanted Section
    Anyone selling a full race catless downpipe for civic si? I been waiting on this backorder and its been two months its getting ridiculous. Im still open headers and i cant wait any longer.
  8. Exhausts and Downpipes
    As my name explains, I am new at this. I have a couple of months with a 2012 si sedan and looking to make it sound better and get some more performance out of it as well. I wasn’t sure where to begin though... should I get a downpipe first? Or the exhaust first? Should I get them at the same...
  9. Exhausts and Downpipes
    Hi guys! First post here I recently bought a plm catless dp without any gaskets or other parts. The seller told me I just need to order a 3 inch gasket. Is there anything else I need for the install? Such as bolts, washers, nuts etc OR can I just reuse the stock ones. And what are the...
  10. Wanted Section
    I'm in the Minneapolis region, but willing to pay shipping. Open to other downpipes as well, but would prefer the RV6 catted one. EDIT: Found one on local craigslist of all places...
  11. ECU Tuning
    So I’ve seen there is the tuning section but I haven’t seen an answer for this question I have, assuming because this is really basic and I just don’t know it. So I have a Invidia N1 cat back + CAI. after I get my coils, I want to get a downpipe to get louder, backfire as well as a little more...
  12. Exhausts and Downpipes
    Working on getting a custom exhaust rolling for my 2015 Honda Civic coupe r18. I like the borla spitfire exhaust. I'm getting that and a Megan racing down pipe probably, don't know much about resonators.. k don't want droning to occur, looking for a nice deep tone. Any recommendations?
  13. Mechanical Problems & Technical Chat
    Hi everybody! History: I have an AEM CAI and the person before me deleted the secondary cat and welded (very poorly) a 3" home-made exhaust to it. I tuned with Steve at E-Tunez with my FlashPro and was very satisfied with the result. I recently ordered and installed my Fullrace Catless...
  14. Si Only
    So this is a sad boi post at sad boi hours.... About two Hours ago my Hasport 70 a Rear motor mount (RMM) cracked. Not only that, I think that due to the cracking of the RMM my Axle popped out the tranny and my RV6 down-pipe bolts became undone along with my belt breaking..... Now the car is...
  15. Canada
    Eh! Anyone here buy/install a downpipe on their 9th gen si? If so what brand and type (Catted or Catless) did you get and do you know if you will pass emissions? Also if you have the RV6, how did you obtain it? Did you order it through the RV6 U.S. site, or is their Canadian retailer that I...
  16. Exhausts and Downpipes
    From forum suggestion, I installed my downpipe with a 70a Rear motor mount & 70a upper torque mount and it still cracked. i was on my usual route to work when all of a sudden the car came obnoxiously loud , and I immediately assumed it was the downpipe , I parked and checked and sure enough it was.
  17. Mechanical Problems & Technical Chat
    Hey everyone, I recently bought a used Buddy Club downpipe. Upon installation, I saw the flange for the downpipe simply does not line up with the OEM Catback. When two bolt holes are aligned, the other doesn't. Has anyone else had this problem? Anyone have suggestions? I have gotten it to work...
  18. Exhausts and Downpipes
    I'm planning on throwinng a CT Supercharger in my '14 SI Sedan. I'm hoping to find a downpipe with the cat to make things a little easier come E-Test time. Anybody know of any High Flow Down Pipes with a cat? Would be a great help. Thanks.
  19. Downpipes and Exhausts
    I am about to install an aftermarket downpipe and noticed the top o2 sensor has a shroud around it which makes using a thin walled o2 socket necessary. Is there a certain one you used that worked for this application? Thank you
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