How do twin loop mufflers affect performance?

[dls0451]

Does anyone know how performance is affected by twin loop mufflers? I've been looking into them recently, as i would like a muffler that isn't too loud, and most importantly not ricey. I HATE fart cannons. It looks like Mugen, OBX, Natemi (never heard of it?), and DC Sports all make twin loop mufflers... the last three seem to be rip offs of the Mugen. I'm just wondering, since the exhaust is being routed through the muffler twice, wouldn't it create excessive back pressure with say a 2.5'' pipe and slow you down some?

[blackcb7]

the real twin loop mufflers are supposed to flow very well, some people on here are running the obx twin loop and seem to be happy with it, i believe phempa, d112crzy and others are running it

[mcdizzle]

im using the obx twinloop, very happy with it. 2.25'' piping with an 18 inch resonator, very quiet until i get on it, then it really growls.

[blackice]

im using the obx twinloop, very happy with it. 2.25'' piping with an 18 inch resonator, very quiet until i get on it, then it really growls.

x2, i love mine....2.5 piping, magnaflow cat, 26" resonator on my h22 woot

[d112crzy]

sounds good, but looks ugly, imo.

i love the way it sounds.

[maroonaccord2.2]

sounds good, but looks ugly, imo.

i love the way it sounds.

It does sound good, but we could totally remount that bitch when I get the welder here. Tuck it up further out of the way.

[93_EXR.]

what is a twin loop was put on stock exhaust?

Loud? or not?

[d112crzy]

It does sound good, but we could totally remount that bitch when I get the welder here. Tuck it up further out of the way.

nah, im gona sell it once i get a new muffler. I want a stock looking canister. I might buy Zach's.

[dls0451]

Yeah, i know they sound alright, but im wondering about performance? Also, isn't the OBX twin loop a 2.5'' in? If its on 2.25'' piping wouldnt you have to have a reducer or something on it? For an NA setup, would a 2.5'' catback with a twin loop be overdoing it?

[mcdizzle]

i think most companies use 2.25'' for catback, i could be wrong tho. and the obx can come in either 2.25 or 2.5 inlet

[d112crzy]

Yeah, i know they sound alright, but im wondering about performance? Also, isn't the OBX twin loop a 2.5'' in? If its on 2.25'' piping wouldnt you have to have a reducer or something on it? For an NA setup, would a 2.5'' catback with a twin loop be overdoing it?

i doubt it makes any difference. a muffler isnt gona rob you more than 1whp.

at least not on a stock or close to stock car(i/h/e is still close to stock)

[abdielitopr]

today i was reading an article on these at school and they're made of fake stainless steel... ...they will start to rust after a while....

[d112crzy]

which ones?

there are a few different ones.

[abdielitopr]

obx twin loop...

[jdc5r]

The way twin loop mufflers work is that driving normally and without much exhuast pressure the exhuast gas will exit through a extended length of piping on the muffler.

However when you boot it and the exhuast pressure inreases it opens a bypass valve if you like and it goes straight out. This way it can keep it soft when you are driving slowly.

It is a given that twinloop is also usually blardy heavy