Quiet exhaust with RB25DET? Is it possible?

[montyismonty]

I live in the Communist Kalifornia, to avoid the unwanted attention from the polizei i need a quiet exhaust. My engine is mainly stock - all it has is greddy intake manifold, fmic, intake, and a 3" exhaust with a 4" tip. Any ideas on how to quiet this sucker down? It sounds like a damn mustang from the 60's. I'm new to the forums so please be patient with me. Thanks.

[bmart]

I'm running a magnaflow muffler with 3 inch pipe from the turbo back on my rb20 and my stock turbo is louder than my exhaust. plus it sounds good too.

[Sil240]

What kinda exhaust do you have?

Get a 3" Cat, a 3" resonator, in there. You can also get a Silencer to go in the end of your tip.

Also if you want check out the QTP electronic cutout. weld one in before your cat and have it dump to atomosphere.

That way you can have your quiet exhaust and open her up if you wanna race.

I eventually wanna do that with mine.

[maryjane]

im running a qtp 3.5inch el cut out and love it, i used to have a muffler on the back of the car to make it super quiet but ditched that and have straight 4 inch.

qtp makes great affordable cut outs!

[Neejay]

im running a qtp 3.5inch el cut out and love it, i used to have a muffler on the back of the car to make it super quiet but ditched that and have straight 4 inch.

qtp makes great affordable cut outs!

So you have a 4" straight pipe AND a QTP cutout? lol

[DrifterProdigy85]

Ive got the Reinhard Dual Tip exhaust. Has a resonator within the piping. Then comes with removable baffles for the rear muffler section and silencers to boot. Its very quiet and mellow with the baffles in. The exhaust is pricey though. I got mine from FRSport.com

[Cjmartz2k]

Apexi ECV is what I use.....................

[RustspecS13]

Cut off your muffler and put on a 3in-2.5in reducer and use a decent 2.5in muffler with a dual tip. That way it looks stockish and it'll quiet it down a lot. You might lose 1-5HP, but you can always up the boost.

Or just get a whole 2.5in exhaust off with a dual tip muffler. That'll cut your HP down 5-15HP or so but its a trade off for less tickets and a quieter ride.

I donno about you but I love my RB20. At stock boost its fairly quiet, and I have a 3in Invidia exhaust. It sounds like a tuned I-6, nothing close to a v8 and is 10x quieter then my NA KA.

Maybe you have some exhaust leaks? You might want to check all your exhaust connections for bag gaskets and loose nuts and bolts.

~Alex

[EVILS14]

Im running a 3.5" hks hi power at a idle you can barely hear it run

[montyismonty]

well, i really appreciate your input. very helpful information. i think a solution is already in the works - buddy sold me his 2.5" single tip for $80. I'll try that out - almost identical to what RustspecS13 has suggested. See in "K"alifornia its getting to the point where cars are being crushed, and i just love my car too much. hahaha

[Sil240]

Come to FL no emissions!!! :-)

[RustspecS13]

Just curious, is your car registered in cali? Because just having the rb in your car will get it cushed, if you get pulled over and you have to pop your hood they will know its not legal and still crush it.

Having a quiet exhaust will obviously help but if you run into a cop that checks every import car....

~Alex

[Mistaken]

I'm running a SSAC catback and a custom downpipe, my car isnt that loud thanks to the stock turbo. Its mainly tho on how you drive, my car is fairly quiet while cruising but sounds like a bat out of hell when i crack the throttle.

[montyismonty]

yup. i know that could happen. i drive like my grandma so they won't pop that hood unless they have probable cause. i'll take them to the moon and back with lawsuits for poping it without reason. haha. they can't profile because i drive an import, otherwise i'll file a classaction for s*** like this and get rich - then make the rb and sr 50state legal (we will all put the mods on after we register and smog)

[montyismonty]

Come to FL no emissions!!! :-)

Yah, i'm really considering moving from this "wonderful" state. LA is the worst city ever. my only problem is - i surf and in florida waves are not year round like in cali. job situation and couple other things are keeping me planted for now.....

[Sil240]

Yeah Jobs situation down here isn't too good right now.But you could pick up a house dirt cheap. (compared to LA)

[maryjane]

Yeah Jobs situation down here isn't too good right now.But you could pick up a house dirt cheap. (compared to LA)

houses are cheap here rite now!!

screw the governator and move to fla, youll have allot more friends w rbs then ya do there

[montyismonty]

i'm definitely thinking of that. i can't stand this liberal/communist state. i just don't know how far my finance degree and experience can get me in florida, might finish my masters first....

[240z4u]

i'm definitely thinking of that. i can't stand this liberal/communist state. i just don't know how far my finance degree and experience can get me in florida, might finish my masters first....

Wow, someone without their head up their a**! Don't see that much anymore. Finish your degree then do whatever the hell you want. Props to you for going to school

[montyismonty]

Thanks for the props, the degree was worth it - but finance is a boring career path. Should’ve studied engineering…Haha.

[yotik]

yeah i hear you guys. im going for management right now, wish me luck finishin the mba on that

im running cxracing 3" downpipe+3"magnaflow 50state legal cat+cxracing 3"catback w/ resonator. super quiet w/silencer on. i couldnt hear the turbo spool before i put the exhaust on now its louder than exhaust. i have silencer off right now and still quiet until i wamp on it. ill put the silencer back in next week prob.

[Bluefire]

Blitz realize TT... Full flowing 3" piping, but super quiet. You hear the engine not the exhaust...

[leesredgt]

Im running a 3.5" hks hi power at a idle you can barely hear it run

Do you have a video of it?Im going to put a 3.5 hks hi power on mine and im curious as how it sounds?

[EVILS14]

here is a link to the 2 videos i have of it its was in a storage so it might sound kind of loud and it wouldnt rev past 2500 cause the ecu was in limp mode http://www.youtube.com/watch?v=O7Q8H5MTCgQ

[EVILS14]

ill try to get a new one by weds

[turboredneck]

I have a striaght 3" exhaust on mine and i can hear the injectors opening and closeing at idle.

[leesredgt]

here is a link to the 2 videos i have of it its was in a storage so it might sound kind of loud and it wouldnt rev past 2500 cause the ecu was in limp mode http://www.youtube.com/watch?v=O7Q8H5MTCgQ

ill try to get a new one by weds

Thanks, i appreciate it!

[montyismonty]

Good video, thank you for the post. Quite surprised at how quiet its sounds in the garage. I'm picking up an exhaust from a friend tomorrow - finally!!! So moving on down from a 3" to 2.5", and will throw a cat on there with a resonator. Later i will weld a dual tip. I know many people have talked me down on the cat part of this but i just can't sit in traffic with that exhaust smell. California is like a parking lot - always a traffic jam. I won't be adding any extra ponies anytime soon so the exhaust can be a 2.5" for now.

[meet07]

make sure you run some sort of cat. Im runing cat delete and a jvtr 3" exhaust...very loud. It use to wake my daughter up when I come home.

[montyismonty]

Here is the update. Got a 2.5" exhaust, put it on, and the car runs pretty quiet. Even when i put the "pedal to the metal" its not as loud. Very satisfied, but the exhaust smell is still horrible. Any ideas with that? Here is what i plan on doing. 1. Changing gaskets - manifold, turbo, downpipe/exhaust2. Sealing off the firewall3. Getting a high-flow cat (which will burn up pretty soon)4. Sealing shift boot inside the car.

Any other ideas?Thanks for all the help to all of you.