What is the pipe diameter? Does it flow as well as most others such as PFS/Apexi/greddy/etc...
I am looking for something quieter and obviously the RB is the quietest but does it flow as well as the others. I have the n1 dual but with my ported engine and the midpipe it is so damn loud. Even with the borla welded into the midpipe its a bit much. So Im just gonna get a PFS catback unless the RB dual is as free flowing, if so then thats my plan B.

So any input from RB dual owners that have had experince with other aftermarket catbacks?


-Dave

 

dumass my car has one and it made 459rwhp. flow enough for you ??

 

I don't have any experience with any other aftermarket exhausts but I can tell you that the RB is 3-inch diameter pipe until the muffler in which it Y's into 2 slightly smaller diameter pipes in the muffler cannister. You might lose a couple hp off the top compared to the duals, but who's going to notice 2-3 hp?

 

I didnt know that was the one you were using Jon, why didnt you tell me ya haggard bastard. But you do know that with that turbo your car should be making 600 hp Ray dynoed 643 on a t78.

 

I hear ya, thanks.

 

plus might i add, that the rb dual tip is sexual.

 

lol, love it when two knowledgeable rotary guys go at it..

 

umm, i dont think im catching your drift...

please explain.

 

Dave,

There was a thread a while back where someone switched from a RB Dual to a Greddy PE and noticed a slight increase in performance on the butt dyno.

I'm sure there is some difference as Rynberg stated the RB is a little smaller. I doubt you'll notice much if anything at all. But as you know, quiet doesn't equal great flow. However, I think the RB Dual is probably your best compromise.

 

but not at 15psi

i should get 600hp @ 25psi

 

Dave,
I also heard the decrease in power is minimal. You already have your answers, but I'd say the exhaust is worth it. I'm very happy with the sound, but with your open exhaust, and ported engine, you will still be loud. For right now, I have both cats on (until I'm done with emissions), and the idle, as well as some throttle is not too loud over stock. But you can't escape the fact, that you will be paying the price for that power you have in decibels.

 

I have the RB single and love it. Hardly makes a peep at idle (compared to stock of course), and when you get on it it sends out a nice note. Didn't really notice a difference between it and the dual tip I heard once on another's car. I have a DP and stock cat.

 

i too can vouch for this. very nice sound.

 

sexual

 

okay dude... we know you like your new dual tip.

 

I like my RB dual tip exhaust a lot, but not in the same way some have expressed. Mine stays on the car at night, and I don't have "special" dreams about it.

 

 

I guess for some, 2 tips are better than one....

 

Thanks fellas for the input.

 

My problem is figuring out which tip is the sexier.... just going back and forth wears me out! Gettin' old, I guess...

Just got done with a 500 mile trip with the duals. LOVE being able to tell when I'm boosing by exhaust note. Not droney, and the stereo will bury it if I want.

But I'm mostly stock but for DP. I'm all weak and girly man...

I suck. Bummer... (sniff)

 

Fd3BOOST: I currently have an M2 DP and CB with the stock cat. I was thinking of going to a midpipe with a muffler welded in to keep it quiet, either a borla or magnaflow. Do you have any suggestions or advice?? Tom

 

for everyones info i have the RB single tip and DP. It is pretty damn loud to me. I thought the single tip and dual tips gave out similar exhaust tones.

 

How old is your exhaust? If it's the current model and you think it's too loud, I STRONGLY suggest you don't get a midpipe or switch to the Apexi GT-spec exhaust....

 

My RB is pretty loud, sounds good though. I wouldnt want any louder, glad I went with the RB. It is quieter than my stock muffler with a hole in it It has a good tone, not all raspy.

 

I havent heard mine yet as Im still in the process of getting my engine up and running. I'm sure everyone knows how I feel about the rb even before hearing it.