Custom Exhaust...need opinions

[gomer23]

So a friend of mine who is gonna help me weld up a custom exhaust and IC piping for my RB25 swap, were talking about what we should do for my exhaust. Well he said we could put a cheapo Hooker muffler (they used one on my friends boosted mustang) where the Cat. converter used to be then just run 3" to the back, so I wouldnt have a big canister in the back. I thought it sounded like a sweet idea, gives a little sleeper look I guess. So I am just looking for any opinions on this idea.

[BoostFab]

custom exhaust is fine....if you eliminate the cat-converter, make sure you ahve atleast one inline muffler somewhere in the middle, it'll save your ear-drums in the long run....it's loud, trust me!

[Shocker]

im going 3 inch straight back with just like a 4.5 inch can, no sense in hiding the RB's amazing note. as for loudness, doesnt bother me a bit.

[Nameless EJ6]

The idea sounds good if you're using mandrel bent pipes. That's what mine is.. except without a muffler.

[thekawaii]

hey just a quick Q, does a resonator effect flow really bad?

[300Plus]

The idea sounds good if you're using mandrel bent pipes. That's what mine is.. except without a muffler.

Hey man I was thinking of going 3 inch mandrel with no muffler or anything but figure it would be too loud. so how loud is it?

-Does anyone know a good site to pick up a quailty high flow muffler, instead of those cheap ebay cans?

[Shocker]

well, ive yet to hear an RB with a straight 3 inch back.. but im guessing its not much different from what i have running down. just a 3 inch downpipe, its loud, like sitting in a 1 car, and reving it to around 6k, actually hurts your ears... but it sounds just mean and amazing, im guessing it will muffle it a bit, prolly like 20% not a whole lot, but it will flow better than a muffler will. as for the cans, check around on a bunch of 240 sites, id give you a link, but i gotta get to school, i plan to spend 50-100 bucks on one. gotta buddy with a tube bender so im set

[Darius]

A resonator is basically a small flow-thru pre-muffler and I don't think there's much head loss through it. It depends on the design of the resonator though. You're ears will be better off with one than without, but I don't know how much sound deadening it will really do.

The next best thing to buying a cat-back system is to have a custom setup done with mandrel bends. As far as using a muffler, to each his own. I personally would like my girlfriend to ride with me every once in a while and not ***** about how loud it is, so I bought a GT Spec . And to find high quality mufflers like those from apexi, hks, greddy, etc... search most of your main sites because a lot of them sell both cat-back exhaust kits and mufflers separately. They don't come as cheap as you'd think though.

[98birdls1]

i plan to spend 50-100 bucks on one. gotta buddy with a tube bender so im set

Your buddy with the bender rich? Cause Mandrel benders are outrageously expensive. And crush bent 3 inch pipes flow about the same as the 240's stock exhaust. (Thats an exaggeration) but the flow sucks on them. do mandrel or buy a catback cause crush bent pipes suck.

Luke

[300Plus]

See I wanted the apexi GT SPEC but don't have the money for the entire system. and I've never found the GT spec muffler by itself, if you tell me that you found a gt spec muffler I will be very happy because I have a buddy at an exhaust shop. fill me in!!!

[Darius]

You can't buy a GT Spec in pieces because the thing is shipped as one 8-foot piece. No flanges or anything, so it costs about $120 to ship it on top of the $440 lowest price I could find. Let there be no mistake though, that thing is big enough for me to reach in the exhaust pipe up to my arm pit and I dont have puny arms

I bet you could find an Apexi N1 muffler canister that would be somewhat similar.

[300Plus]

Ive been lookin man. ANYONE CAN FIND A NICE MUFFLER SIMILIAR TO THE GT SPEC I WILL OWE YOU BIG!!!

LIKE THIS...

[240SX GT-S]

The A'pexi GT is 3 3/4" piping with no resonator right? Thats must be pretty loud, or is it? I was thinking about going with that system because of its one piece design. but I just can't imagine such huge piping being benifical, 3 inches seems plenty.

[Nameless EJ6]

My exhaust isn't terribly loud. I like the sound. It's burly at low rpm, at high rpm it sounds mean.. not raspy. But ya know.. it'll frighten an unsuspecting person if I mash the throttle with the clutch in.. and set off car alarms in parking garages, wake the neighbors, all that good stuff.

So all in all, I'd recommend running a straight pipe. With a 6 cylinder turbo, the sound will be nice as the turbo will take care of the nasty notes at higher rpms. No resonators no cat converters, it's all unnecessary junk IMO.

Forgot to mention that I'm still on KA.

[Darius]

The GT Spec has a resonator on it and yeah it steps up from 75mm to 85mm to 95 mm before it hits the muffler canister. Then it exits through a 115mm tip (aka coffee can). I don't have the motor finished yet, so I don't know how loud it is. And on a turbo motor, there is no such thing as too big. The biggest reason all of us actually run an exhaust pipe (second to noise) is to avoid carbon monoxide poisoning.

300 Plus- Here's one I found just by searching N1 muffler canister on google. You can probably price shop around and find something cheaper. http://store.racinglab.com/apunmu.html YOU OWE ME BIG!! jk man

[matt_calgary]

I have straight 3" piping all the way back to the muffler which is from RS*R. Considering there is only one sound deading device, the RS*R doesn't restrict flow and really quiets things down. Its expensive though but sleek black never fails to have the sleeper look

[Carl H]

buddy club spec 2 on my rb20, and lemme say while it sounds fcking beast it is also uber loud.

[thekawaii]

Any opinion on Magnaflow exhaust? I have a connection, i can get it fairly cheap. what do you guys think?

Custom downpipe, Magnaflow resonator, Custom piping, Magnaflow muffler.all 3 inch setup.

(I'm trying to get something really quite but doesn't hurt performance)

[Darius]

You probably don't want a magnaflow if you want performance. It's tough to keep performance while trying to mitigate noise. I've heard Greddy PE-2's are pretty quiet and matt_calgary said the RS*R muffler is pretty quiet.

[Darius]

Here are links to some pics of my GT Spec exhaust. Notice the quarter for size reference.

http://nissaninfiniticlub.net/...age=1h ... t/...age=1

[BoostFab]

i custom made my exhaust on my last RB with 3" straight through and a n1 muffler....the sound was mean when on full throttle...it's louder than i can handle; i don't want ppl to hear me 1/2 mile away.

[Shocker]

LukeQuote »Your buddy with the bender rich? Cause Mandrel benders are outrageously expensive. And crush bent 3 inch pipes flow about the same as the 240's stock exhaust. (Thats an exaggeration) but the flow sucks on them. do mandrel or buy a catback cause crush bent pipes suck.

Luke[/quote]he works at a custom 4x4 shop, so they have just about anything i could really imagine.

[thekawaii]

You probably don't want a magnaflow if you want performance. It's tough to keep performance while trying to mitigate noise. I've heard Greddy PE-2's are pretty quiet and matt_calgary said the RS*R muffler is pretty quiet.

Does RS-R has resonator with it? It (picture) looks like it doesn't have one.

So is it the muffler that makes it so quite? (if i can find rs-r muffler only... hopefully)

[Carl H]

hello loud.http://www.buddyclub.us/buddyc....html

[300Plus]

300 Plus- Here's one I found just by searching N1 muffler canister on google. You can probably price shop around and find something cheaper. http://store.racinglab.com/apunmu.html YOU OWE ME BIG!! jk man

Yeah I've seen the N-1's and look alikes and I might have to settle with the N1 but I wanted something closer to the gt spec. I guess I'll just keep looking around. I think I'm going to run a strait pipe no muffler or anything just so i can see how she drives and then add a muffler if needed. I'll keep everyone posted. I'll post up plenty of videos when time comesThanks guys!!

[Darius]

I'm not sure if the RS*R catback comes with a resonator, but I'm assuming it does since most do. Even the Buddy Club that Carl linked to has a "resonator" (even though it probably doesn't do anything).

And yeah the reason the RS*R is quiet is because it's not a flow-thru muffler. With a flow-thru muffler, there's only so much you can do to deaden sound. A typical muffler design like RS*R probably has baffles and insulation in it to REALLY knock the sound down. Basic rule of thumb is that the flow-thru mufflers are performance minded while other mufflers are sound-deadening. There's cross over betwen the two of course, but in general that's the way it is.