Going to turbo an LS and want to know how big of an exhaust I should get. I don't want anything loud. I know the turbine will help quite it down a bit, but I also hear many turbo hondas sound, well like a honda. I'm trying to get away from that loud, annoying sound. I was thinking 2.25 to 2.5" piping. Too small?

BTW, this is my daily beater that I need to keep quite and 100% streetable. I'll probably end up using a 14b to a 16g mitsubishi turbo. They both have a pretty small exhaust a/r, so I might do 3" piping, depends on how loud your guys exhaust are. I want to hear from first hand experience before learning the hard way

Thanks for any advise

 

I had a Apexi N1 on my car with no cat and it was pretty quiet with the turbo. Now i'm running open DP and I drive it 50 miles a day with no problems, kinda loud though

 

Hi flow cat, 22 inch resonator, oval 3 inch inlet/outlet, 3 inch piping. i couldnt imagine that would be loud???

 

3" piping, 3" cat, 3" magnaflow race muffler.............loud as ****. But if anything its making me get better gas mileage, cuz I try to keep it between 2000-3000 rpm to avoid the noise.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Alchemist &raquo;</TD></TR><TR><TD CLASS="quote">3" piping, 3" cat, 3" magnaflow race muffler.............loud as ****. But if anything its making me get better gas mileage, cuz I try to keep it between 2000-3000 rpm to avoid the noise. </TD></TR></TABLE>

Get a resonator, it helps a LOT.

3" downpipe, 22" resonator, 3" apexi N1. Quiet enough to daily drive fine, and I can roll into my neighbourhood late at night without waking anyone up.

 

full 2 1/2 all the way apexi n1, quiter than when i had the stock h22 and cat on with the 2 1/2 catback

 

3" downturn.

loud.

if you say a cat, a resonator, and a muffler is loud then you've never heard a str8 pipe N/A race motor lol.

 

Thanks guys. I think I'm gonna try 3" with a high flow cat, resonator, and a Magnaflow chambered muffler.

Pete, if you think a honda NA race motor is loud, then you should hear an NA rotary Ear piercing, seriously

 

3" no cat and n1 look a like.......pretty annoying

 

Had a 2.5" DP---&gt;2.5" TP---&gt;60mm exhaust w/chambered muffler and it was silent...awesome for daily driving.

Just slapped on a 3" exhaust, no cat no resonators, its crazy loud. No cell phones, radio has to be cranked up to hear anything. Going to add a 3" DP and 22" resonator and see what happens.

 

2.5" DP
2.5" Cat
2.5" x 22" perf core resonator
2.5" summit turbo oveal muff


it's deep and pretty quiet. sounds like a sohc with a Greddy SP. I like it and the catback part only cost $90 including the mandrel bends.

I hardly agree that the turbine will quiet it down at all. Just built a kit for a GSR with a fully worn out tanabe racing medalion and it was absolutly no quieter than before, even with stock cat.

 

2.5" Downpipe
Stock cat
"Cherry Bomb" muffler as a resinator
2.25" mandrel bent
Big shiny muffler at the end

It sounded pretty good while N/A, I used the muffler silencer cause I like it really quiet. Once I put the turbo on it became really quiet so I pulled the silencer off. It sounds great once i went turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">2.5" DP
2.5" Cat
2.5" x 22" perf core resonator
2.5" summit turbo oveal muff


it's deep and pretty quiet. sounds like a sohc with a Greddy SP. I like it and the catback part only cost $90 including the mandrel bends.

I hardly agree that the turbine will quiet it down at all. Just built a kit for a GSR with a fully worn out tanabe racing medalion and it was absolutly no quieter than before, even with stock cat. </TD></TR></TABLE>

The turbine wheel and housing both have an impact on how loud the exhaust is. Depending on what size wheel, what a/r, what type of wheel, it can substantially lower exhaust sound. A 14b turbo is pretty small so it will definitely lower the exhaust tone

3" here I come

 

I have a 3" Thermal, 3" carsound cat, 3" resonator, and it's too loud for long highway drives. I heard Thermal will weld in a resonator into their muffler for free if you ship it to them, and I'm considering doing this.

 

2.5 downpipe, test pipe. reducer pipe 2.5-3", to 3" piping/magnaflow muffler.

no resonators, no cat. its not loud at all.

 

Open DP is the ****!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stickdeath &raquo;</TD></TR><TR><TD CLASS="quote">Open DP is the ****! </TD></TR></TABLE>

I will second this... 3" no less...

 

3" DP
Gutted Cat
2.25" Thermal Cat back

Crap this is quiet! Its definately quieter than it was when it was NA. I was going to get a 3" Kteller exhuast kit, but now I think i will leave it, and get an E-Out someday down the road. I like having the quiet exhaust.

 

im going to be running a 4" downpipe with 1 or 2 dynamax 4" bullet mufflers and a downturn. Ill post the vids when its all said and done

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pete98m3 &raquo;</TD></TR><TR><TD CLASS="quote">3" downturn.

loud.

if you say a cat, a resonator, and a muffler is loud then you've never heard a str8 pipe N/A race motor lol. </TD></TR></TABLE>

hhaahha yea... i know exactly what this guy is talkin about haha

 

i have 2.5 DP and 3" exhaust to magnaflow muffler. its really not to loud, more a deeper sound to it, IMO.

 

3" downpipe...3" K teller piping...3" dynomax bullet muffler as resonator...3" magnaflow on the end. No cat...It's not exactly quiet, but it's got a really nice sound to it...low grumble.

 

4" i really like it, its really deep, sounds like a supra actually

 

I'm running a 3"dp to a 3" Thermal Cat Back exhaust with 3" resenator

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Geoff &raquo;</TD></TR><TR><TD CLASS="quote">4" i really like it, its really deep, sounds like a supra actually



</TD></TR></TABLE>

Holy ***** Geoff 4"! haha looks good man. Get Jeff (Boosted-Hybrid) to do one of those on his K series setup