Finally completed my 3 inch diameter single exit exhaust! Full setup consists of PCD's, J Pipe, Test pipe to replace third cat, then I reused the flange off the stock exhaust into 3" tubing. Immediately after the test pipe is a vibrant ultra quiet resonator which did wonders to massively tone both drone and rasp down. Then after that it goes into another smaller resonator, and then back into a Dynomax straight through muffler with a 4" opening slanted tip.

​​​​​ Overall I'm really happy with how it turned out and honestly it wasn't too much of a pain to plan out and build. Definitely felt some increase on the trip end of the powerband as well which was also my goal!

Here's some standing revs of the exhaust, I gotta figure out a way to record some fly bys but once I do I'll post those here too. Let me know what you think!
https://youtube.com/shorts/bkDIP4ZRKGg?feature=share







​​​​​​

 

WOW. Cool mod!

 

Wonder what the weight savings on that setup vs stock is.

 

Probably a nice amount, didn't really get to weigh anything but it definitely felt quite a bit lighter than the stock exhaust, those stock mufflers especially weigh a lot for sure lol

 

I can second that, the OEM mufflers are HEAVY, and ironically the OEM resonators on the AWD models are surprisingly light for it's size. Did you notice any performance difference with having larger diameter piping? Your car sounds good, although I can still hear a bit of rasp, that's probably due to having the PCDs installed.
Just an observation I think the exhaust tip should have been extended past the bumper a few inches, I can see carbon deposits on your bumper 😐

 

Mid/Top end power is definitely improved with the 3 inch piping. Before this exhaust I had pretty much every bolt on besides the spacers, and it felt nice up until maybe 80-85 where you'd notice the limitations of the stock exhaust and kinda start to hit a wall. I'd also feel it in the upper revs where it would stop building power at around 6300 RPM. Now it pulls hard from VTEC all the way to 7k (feels like it does anyway) and pulls a lot stronger on that 80MPH+ area for sure. Definitely a noticeable improvement, not as huge as like PCD's + Jpipe would make you feel but enough to know it actually did something.
As for the sound yeah it still does have that rasp but if you had heard it before I put that vibrant resonator on man that was horrible, so going from that to what I have now I'm very happy with it, might experiment in the future with another resonator but for now I'm happy about it.
And then for the soot on the bumper, that's actually always been there since I bought the car stock. I won't deny that this exhaust hasn't contributed to that stain but I'm not too worried about it, I can always clean it up at some point lol.

 

How loud is it ? Is it tolerable or obnoxious?

 

It's pretty loud, being there's no cats and the resonators/mufflers are straight through, as it sits right now it can get annoying inside the cabin and it does mess with the bass on some songs too but personally I can tolerate it. I do plan on adding another vibrant ultra quiet resonator and that should mellow it out to the perfect level.
As far as obnoxious I don't think so? People can definitely hear it coming but it's not a harsh note like a VQ would have if that makes sense. Either way if you're looking for max power gains this is the way to go for sure, I made 311 whp on the Dyno and I doubt the OEM y pipe would've let me come close to that

 

Here's a sound clip on the dyno I've yet to get any fly bys but I might try to soon