Wanted some info and input to ensure that I understand the differences between these exhausts before dishing out my hard earned cash.

I am trying to do an impromptu exhaust comparison to decide between the Racing Beat dual tip, M2 dual tip, HKS Turbo and Greddy SP. These 4 seem to be the quietest of the exhausts out there.

In order of quietest to louder, is this correct?

1. Racing Beat dual tip - quietest at idle and nice at WOT

2. M2 - slightly louder than RB at idle and low RPM and nice at WOT. Any louder than RB at WOT? Some people say less drone than the RB dual?

3. Racing Beat single tip and M2 single tip - from what I've read on this board they seem about even. Slightly louder than their dual tip counterparts. Does this sound right?

3. HKS Turbo - slightly louder than the above, how is dron on the highway?

4. PFS - any input on how this compares?

5. Greddy SP - loudest of these at idle and WOT.

I wouldn't mind getting the RB duals based on everyones constant good feedback, but they are hard to get a hold of. Which leaves the M2 duals. Not much info available on them. M2 says they drone less than the RB, but I don't know if I buy it. Are the M2 tips resonated or something? The pics on M2s web site suck but it looks like they might be?

While I prefer the look of the duals, I can save some cash by getting Greddy, PFS or HKS especially if I get used. You see them pretty easily for $200 or less. Which might be cool if the sound levels are tolerable.

I want a nice sounding exhaust that is mellow, quiet at idle, little resonance when cruising along at 2,500 RPM at low speed, not too much drone on the highway at constant 70-80mph, but still sounds good at WOT. I used to have a full HKS (downpipe, resonated-mid and catback) on my old Turbo II and loved the way that sounded. Very nice ripping sound at WOT, yet decent at idle. Wouldn't mind quieter at idle.

The exhaust is intended to be used on my car with the stock cat and a downpipe. Maybe at some point I'll get a resonated mid-pipe, but I'm happy with stock cat for now (emissions).

Thanks for the info and sorry bout the long post.

 

If my car wasnt in pieces I'd try and record it or something, but it had a Greddy SP with a stock otherwise exhaust, I really liked it, quiet, but let you knew the car was a little mean in the cabin. I'm told <having never been behind the car at speed cuz I'm always driving it > that it sounds REAL mad at WOT from behind, but you'd never know it in the car. A friend of mine had a resonated 3" exhaust on his GTI that was notorious for its angry rasp under boost, and I was told that mine makes it sound mundane, lol.

 

I have the RB dual tip. I bought it because I wanted a quiet exhaust. I am very happy with it. Quiet at idle. No droning at ANY speed. Not that loud at WOT either.

Easy to install, with no fitment problems. I also have stock cat and DP.

Ideal for me.....and you!!

 

I thought the Greddy SP was pretty damn quiet compared to my straight through exhaust with N1.

 

BMike - glad you told me about how the Greddy sounded in the cabin. i think a loud cabin will probably annoy me even if it sounds cool from the outside. Exactly the kind of info I'm looking for.

Anyone else?

rogue3 - I once drove my old 88 Turbo II 'Vert conversion from CA to NY. Full HKS exhaust. The center resonator cracked while doing a 150+mph test between Nevada and then I had to drive it all the way back. I never want to drive another rotary with straight pipes

 

I have the HKS Turbo and haven't noticed a drone at freeway speed. I'd even have to say my new tires are more noticeable than my exhaust. The idle is deep and sounds great at WOT.

 

I have the M2 dualtip. It has a nice deep sound. I have it, a downpipe and the stock cat. It isn't really loud at all. At idle and just cruising around, it is very quiet. At WOT it is growly, but definitely not obnoxious. I'm not sure how loud it would be with a midpipe.

 

Try the new HKS it's noise legal. You can find it on takakaira.com. The M2 & RB are quiet but aren't they mild steel? Isn't the can on the Greddy SP huge?

 

I don't know about the Racing Beat, but the M2 is Stainless Steel.

 

i have the n1 dual with a midpipe and hks downpipe...its the loudest car ive come across in the entire area. its embarrassing...well except when Im kicking someones ***...then its intimidating...but it renders the radio useless..haha

the racing beat on a midpipe sounded tinny to me...not nearly as loud as with the n1 dual though....

the pettit with a cat sounds very deep...more of a growl than a drone my n1 dual has.

i wish i could know which was the quietest of the exhausts when running a midpipe.


j

 

RB is stainless as well. I second adamc above, I have the same exhaust set up as him. On mild acceleration, the RB in not much loder than stock, under heavy throttle it's very present and you can tell your rpms from it alone On decel, the tips resonate nicely coming down from 3000 rpm, you can easily tell what your rpms are by lifting a little. Idle is a very nice mutter without intrusion on the cabin. I like it VERY much, and it looks outstanding!

 

Hmm, thought I read in another post that the cans (not piping & tip) on RB & M2 were mild steel and heavy. MaxC has the RB and MP but he says he still doesn't meet the track noise limits. He is running a single if that makes a diff. My Pettit is a nice low sound but has a slight drone that can be heard with the radio off. There are several sound clips for the new HKS on their website (none are rotary though). I can't wait for my Boder Racing DP back.

 

Dont forget the N1 style exhaust. Its one of the quieter ones.

 

i have the greddy sp. idle is very quiet but deceleration and cruise in 5th gear is loud. sound is very mature though, not some middle of the night wake you up honda loud. if i had the choice though, i would go with RB dual.

 

The Racing Beat (current model) is fully stainless steel. The muffler and the tips are nicely polished. It is heavy than the cannister exhausts because it's better made and uses more sound reducing material. It's still lighter than stock though, so I'm not complaining.

It sounds very nice with no droning. Spurvo's description is dead on with the sound at different conditions. At first, I didn't like the boomy resonation when letting off the throttle at 3k but I quickly learned to LOVE it. The exhaust is pretty quiet until the secondary kicks in when it roars nicely. Highly recommend the RB.

This is with a downpipe and stock cat.

 

nm

 

I have the Greddy SP and like it. Nice deep tone.

For those interested we will have our dyno up in a couple of weeks and will be doing testing on most of the exhausts on the market. Should give us a good idea of how each compares in HP.

Jason

 

Let us know when you have the results!

Another idea ... beg, borrow, or buy a sound pressure meter. It would be interesting to have standardized readings (dB I think) from say the drivers seat and 20 feet behind the car. This page could be a great "pull" to your web site!

 

Yeah Jason, some sweet pics and sound clips to!

 

There will always be a trade off between HP and noise levels. The RB and the M2 are the quietest. The others are louder, but will provide slightly more HP.

Low noise, quality craftsmanship, and ease of installation were my requirements. One of the reasons I chose RB over M2 was because of RB's 2 piece design. Easier to install. Probably slightly quieter too.

 

hey jason...which of your exhausts is your favorite?

which of your exhausts is the quietest with a midpipe?


i figured if anyone knows...its you.

the results of the dyno stuff will be cool to see...thanks


j

 

dont forget about the new Japanese RS-R systems. RS-R EXMAG's are the most quiet exhausts for most cars.

They have a EXMAG street system for the FD3S too.

check it out here http://rs-r.com/exmag.htm

there are pics on the website too.

 

I prefer the Greddy SP, just because of the sound. I have tried most of the exhausts on the market with my T-78 and most were to loud for me. The only thing I dont like about the SP is that it drones alot on the highway.

We will try to get video of each of the exhausts we dyno test. The RS-R will be one of the exhausts. I figure we will test these exhausts.

Base line Dyno: Greddy SP
Apexi GT Spec
Racingbeat Dual tip
M2 Single Tip
JIC titanium
RS-R
Kakimoto
HKS Carbonfiber
HKS Titanium race exhaust
Greddy EVO
Apexi Dual Tip

If you can think of any others let me know.

Jason

 

A friend of mine recommended the Greddy SP, and I found one in xlnt condition used for $250. I have the stock cat currently, but have a SS DP. It's fairly quiet at idle, and moderately quiet at low throttle settings, but anything over half throttle/3000 rpm and the noise level increases substantially. Plus the drone while cruising on the highway at 3000 rpm is fairly loud, and somewhat annoying.

I'll be interested to see Jason's dyno tests myself, as I'm seriously considering the RB dual CB (even though some say they're currently on back order), and will be installing my N-Tech hi-flow cat soon.

 

To cut back to this, its worth noting, the Greddy can is HUGE, 5" outlet folgers style, ive actually heard a few comments on it already on my car. Of course the ricers its comming from have absolutely no room to talk, and its at least remotely close to functionally sized for my exhaust, lol. The muffler is pretty big too, and you really arent replacing alot of pipe cuz the stock cat doesnt stop till a foot shy of the rear axle or so...