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I used some thin stainless steel shim material and was able to seat the downpipes better. No more leak. I'm very happy that I went 2.5. I should've done that from the getgo. The 3" is nice but let's be honest, it is loud. Here are some sound clips...

I swapped my Thermal 3" for a Thermal 2.5" that a local guy had. We both got what we wanted. The 2.5 is nice and quiet mostly, and still roars at WOT. However, he had the CVFab downpipes on his, and his midpipe was expanded to fit. So now it's kind of loosely on my downpipes. It's only being...

I just went from thermal 3" to 2.5 and I like it a lot more. Still loud at WOT but more tame under light acceleration and even quieter at cruise.

I was under the car this past weekend changing the trans fluid and the pan. I feel a bit more confident with doing it now. Shouldn't be too hard to get the heat shielding off. Will I have to lose this bracket that mounts the DP to the car? Or can I cut a few inches downstream of that and...

If you're not going to use an ethanol blend, it's not necessary to upgrade the fuel system. You will be octane limited even if you upgrade the HPFP, injectors, aux fuel. It sounds like PI for your use case might be overkill. If you want to go full E85, you can upgrade the HPFP and injectors...

Are you saying that you had a bad o ring that was out of warranty, so you sealed it yourself with permatex and it held for 2 years? Might try doing this as added insurance on my updated o ring. I'm about 4k miles away from the expiration of my extended warranty, and don't think I have another...

I would double check all the hangers and connections and see if anything is making contact, or if it's excessively tight.

Maybe if you upload the videos to Youtube, you can link them here. Or if you have an Android, they should be in your google photos or google drive. Now I'm regretting my decision to go with Whoosh Downpipes because it won't be as easy to install Vibrant ultra quiets...

The stock transmission mount is soft and has some voids in it. This allows the driveline to move around a bit. This mount will help keep the transmission and driveline more stable, which should help shifts feel more firm, and ultimately put more power to the ground. I also theorize that...

I really wanted the Velgen VF5s but didn't want to go 22. Now I see the offer them in 20... Oh well, I got a great deal on these! They kind of look like a poor man's version.

I ended up going with the 3" and have Whoosh DPs. It's not bad on the highway. At anything over 10% throttle, it is a bit loud. However, my wife and kids don't complain about the sound. Maybe it's just me. I do wish it was quieter when cruising though. And I have mentioned that I want to add...

He still has it. I think he went with a Garrett G series. Can't remember which one. Maybe G30-900? Or G35-1070?

That start-up clatter you describe sounds like a cam phaser issue.

I added the Steeda transmission mount insert. I got it done in less than an hour. No NVH.

I went from 3" thermal (with a ripped downpipe!) to whoosh downpipes. It made it a bit louder. Perhaps too loud, but I gotta live with it now.

Do you think both could have fit near the thermal resonator? Any issues with the resonators not being symmetrically in the same location on the driver and passenger side?

Do you remember what length resonator you were able to fit? I think this section of the thermal has a clamp there.

That looks pretty good, do you have a link to the part? Which Carlinkit did you order?

This is the only one I currently have: I'm glad I got them when I did at $259. I just checked and they are $465 now.

Pros: This will keep your intake valves clean, can probably make more power than upgrading the HPFP and DI injectors Cons: You are adding a somewhat complex fuel system, the fuel controller has to be tuned for separately, there is a risk since many components of this system could potentially...