That's a seriously loud setup... our SS is a touch quieter than the QS and even that with cats is too loud for me...

 

Yeah I don't know what to do. Will the car slow down a lot if I replace the exhaust?

 

If you replaced it with an OEM exhaust you're losing about 6 BHP and adding 35lbs. Somewhat noticeable. If you replace it with another sports exhaust, regardless of manufacturer or sound level there will be no difference.

I know you mentioned 20BHP from the Quicksilver but in our experience the exhaust on the V8 will do about 5-7BHP regardless of manufacturer.

 

Ah man, I'll give it a few months, then decide. I see plenty of people running this setup, don't know why it bothers me. I'm not used to a loud car I guess.


And I quoted 20bhp becuase of what I've read, and how it works coupled with the PP. It seems pretty accurate based on my WHP at a 20% drivetrain loss.

 

I used to have the same issue with my cats+tubi it never gets less loud you will only loose your ear drums. Lol

I sold the tubi and I'm happy with the stock big box (fuse in for now)and RSC cats.

(Headers are on my wish list)

 

I love my QS exhaust. If you rev it up right, you really get a good sound out of it. But I like the speed of the headers.

Got any clips of the RSC headers alone, and stock exhaust?

 

Do you mean the cats?

Yeah I miss my tubi also.

 

CJ-Thank you for taking the time to do the before and after dynos with the CATs. We have the exact same set up and I will be installing the RSC cats after I take care of a minor issue.

I will also post before/after dynos and videos. We will now have a small sample size!

I am somewhat worried about the sound now. Any chance you could post some sound clips or videos outside of the dyno with the current set up?

 

Just went on the site that did your install/cats-great write up on your car!
http://rttuning.com/

 

You would love the RPI setup once its fully broken in. It will help quiet & smoothen out your setup alot and would also allow for headers down the road

 

It is loud. I will try and post clips. I have a few on my phone, but I got to convert them. Or tomorrow I will try and record new ones via video or something,

Thanks! That article is great!!! I liked the shop when I went there, and now like it more.

Whats the RPI setup exactly? And I really do hope its settles down a bit....

 

The RPI cat back is unique in its construction allowing for the maximum high rpm flow and still provide plenty of muffling. The RPI changes the pitch and tone of the catback and refines the exhaust note significantly (which is why I got it because i was planning on cats and headers). It isnt much louder than stock but it smoothens out the pulses so its much easier kn the ears compared to the other exhausts out there.

The RPI is meant for those looking to seriously unlock the maximum power out of the entire exhaust system. For those looking to just get a catback its not the most recommended route. Those doing headers & cats I would say its almost mandatory.

Hope that helps

 

In what way is it unique in its construction?

 

Unlike virtually every other exhaust out there on the market which has both exhaust pipes entering small canister without any sort of proper high flow x-pipe, the RPI has both pipes enter a high flow mandrel x-pipe then splits into two massive canisters which then exit just before the exhaust tips.

It is by far the most superior design given the space constraints. It is important to remember that the stock exhausr has no built in x-pipe or resonators of any kind , partially on purpose to give a very loud exhuast not. The RPI design properly compensates for this.

I am shocked nobody else has started using this design, giving RPI a virtual monopoly on that design. Hopefully other manifacturers will start using this superior design and providing it for a better price (hint hint)

 

Gotcha. We use X-pipe designs on many of our exhausts, some of them internal to the exhaust boxes. On this application it doesn't produce the sound that we were looking for. I'm not sure I would describe it as a superior design, it is just different.