91mazdarx7

just a couple questions i was going to buy the racing beat 80mm dp mid pipe. but they wont work with the catback i want so i have to get the corksport 80mm dp and mid pipe. my question is does the corksport mid pipe quiet down the exhaust at all i will be runing a apexi cat back off of the 80mm pipes and it will be loud i dont mind it being loud just not unbearable and get cops attention

ddub

The racing beat downpipe and midpipe (presilencer is what you're referring to right?) should bolt up to the stock catback location. Same with the CS downpipe and cat replacement pipe. The Corksport midpipe is just a cat replacement pipe, it's straight through pipe, no silencing.

91mazdarx7

damn do you think the corksport 80mm dp will bolt up to the rb 80mm pre silencer and be the right length to bolt up to a apexi catback i will need the cs dp and mid pipe but i want some silencing so it wont be as loud and i dont really want to put a muffler in the middle either

ddub

Don't think so. As far as I recall the RB presilencers are ~20" long, now their downpipes and presilencer comobos mate up to the stock catback location, but only together. The CS downpipe goes to the stock main cat location IIRC, and the cat replacement pipe is stock main cat length at 17.5"

91mazdarx7

so your saying the rb dp pre silencer is long enough to go to the stock catback location at the y pipe right? if so then i can get the rb dp mid pipe and it will bolt up to the apexi catback without any probs

1987RX7guy

iTrader: (3)

Guys you all are insane. The 80mm RB DP and silencer will not bolt up to anything but the rest of the 80mm turboback. Its a completely proprietary length. The ones t hat should bolt up are the 2.5" DP/silencer.

91mazdarx7

thats what i thought aint the 80mm to short to bolt up to the catback what exhaust should i get if i want to run 80mm the whole way back to a apexi cat back i want a pre silencer i like the racing beat pre silencer but corksport dont make one any info would help i want to start redoing my exhaust right away

1987RX7guy

iTrader: (3)

Get the RB 80mm turboback. Get rid of those noisy N1's.

91mazdarx7

any other options damn who knew it would be such a pita when i just want a 80mm dp mid pipe that has a pre silencer to mate to my n1

Madrx7racer

if the N1s are for an NA with straight pipes: DON'T DO IT!! It is loud as ****

If the N1s are for a TURBO DON'T DO IT! they are heavy as ****.....go single N1

1987RX7guy

iTrader: (3)

I think that it will make little different because your Apex'i Y pipe is smaller than the full 80mm Y which has an inlet of 80mm instead of 2.5" like the N1's. So you still have a bottle neck.

Sell then N1's after you buy the RB turbo back and you will make back ~60% of the RB turbo back cost.

91mazdarx7

i aint going with the turboback its to quiet i just want the 80mm dp and pre silencer to apexi n1's. but it wont work because its to short which is why i was going to go with the corksport 80mm dp to mid pipe. but i want some silencing instead of all straight pipes until the mufflers so is there a pre silencer i can get besides putting a muffler in there

1987RX7guy

iTrader: (3)

From what I have read there isn't an option for your wants.

91mazdarx7

there isnt any real power lose going with the n1's vs the turboback is there would my exhaust be real loud or just loud having the corksport dp mid pipe and apexi duals

1987RX7guy

iTrader: (3)

My friend had 2.5 DP/MP and the N1's and it was too loud for my taste. With a high flow cat it was much better. I could only assume that with a 3.125" DP and MP it would be nasty loud.

If you want a decent sound level have a race pipe made for the RB pre-silencer section on the turbo back.

To give you a hint at the sound quality of the RB stuff the RB pre-silencer ALONE with the RB DP was less noisy than the 2.5" DP/MP with N1's.

Funkspectrum

iTrader: (5)

I have the 2.5"DP ~ apexi N1 setup. TOO LOUD.

91mazdarx7

do you think if i got a high flo cat to go in between the dp and mid pipe to apexi duals it would tone it down enough so it wont be real loud but be bearable

Turbonut

iTrader: (1)

I don't think a high flow cat will cut the noise down that much. Don't know if you go with the RB presilencer and modify it to fit your application, it will reduce the noise significantly. Don't forget the RB mufflers do a darn good job of cutting the noise themselves and the presilencer just adds to that.

91mazdarx7

yea thats why i would like to have the rb pre silencer isnt the reason the rb 80mm dp pre silencer dont work on other cat backs is because its to short maybebe i could get a muffler shop to just make an extension piece to mate the pre silencer to the cat back anyone know for sure why they wont fit im almost sure thats why they dont anyone running the setup i want to run if so how did you's get it to mate up thanks for all the help so far keep it coming

ddub

Do this, this is what I'm doing right now but on an NA.

Get the CS 80mm downpipe and instead of putting in the CS midpipe get a 3" in/out borla XR1 that has a 12" body length and get the ends welded with flanges and extended out to a overall length of 17.5". The stock cat length, which is the length of the CS cat replacement pipe, is 17.5" so just get some other muffler and have it made to that length.

sicc83

iTrader: (1)

You want to bolt up the CS 80mm DP/MP to a dual N1 catback? If so, they won't just bolt right up. Not because of length, but because the y-pipe is like 2.5". It's possible to modify the flange on the y-pipe to get it to bolt up, but it will be a bottleneck. I'm running that exact setup with no problems, but obviously it's not the best flowing thing out there.

91mazdarx7

i wanted to run the rb dp pre silencer because i wanted a silencer in there but it woudnt mate up to the catback i wanted so i was going to get the corksport are you sure the corksport wont mate up either so its just the flangeon the cs is a 80mm and the apexi is 2.5

91mazdarx7

sicc83 can you tell me your whole exhaust setup and how does it sound is it loud

sicc83

iTrader: (1)

I have the CS 80mm downpipe, midpipe and Apex dual N1 catback. To get them to bolt together, I basically welded steel to the outer edges of the Apex flange. This allowed the 80mm midpipe flange to seal to the y-pipe using a RB 80mm gasket.

I don't know how to explain how loud it is because thats totally subjective. You can't judge w/o hearing it live.

1987RX7guy

iTrader: (3)

Maybe this will help, at idle my friends TII with 2.5" DP/MP and N1's would vibrate. If you stood behind it and spoke it would distort your voice.