kem

The fabspeeds certainly sound good, but I think as far as sports car exhausts go they are pretty quiet. My C4S with fabs sounds stock to compared to my neighbors NSX with exhaust, or my old M Coupe.

You think adding fabspeed sport cats will help make it louder? Muffler bypass are definitely too loud, but I wouldnt mind adding a little more growl.

deputydog95

headers definately will pump up the volume, but will change the tone considerably.

karlooz

that is sooo odd because i couldn't tell if there is a tonal and volume difference. when i did the mod i didn't have the supercharger. now throwing a SC on does make a big difference.

TT Surgeon

I didn't notice any significant sound difference with headers, pulled better.

Cowhorn

PSE=Purrrrfect!

AlexL.

I wish my Fabspeeds were a bit louder as well. I may just end up with the bypass pipes even though everyone seems to think they are disturbingly loud. I drove a car with the bypass pipes and it was a great experience. I am not sure if living with them everyday would change my mind.

Also, I would think that the cabs are louder in the cockpit than the coupes. I have a coupe, does anyone out there have bypass pipes with the coupe and how do you like them?

ElTorrente

So what's the deal: do they resonate or don't they?

I've read other people's comments saying they could hear the Fabs resonate in the cabin. Blasting around town or on canyon runs with the windows down would be great, but sometimes I want peace on quite with the windows up on the highway, and that is where I worry about a resonating exhaust. I want a mean sounding exhaust and would like to lose some weight off the back-end, so PSE is out. Not that PSE sounds bad or anything, I just want a lighter exhaust.

Nutbeem

No resonance - at speed on the freeway, they sound stock until you stand on it...

delirium

so an exhaust makes a difference on the 3.6L cars as well? I thought the 3.6L cars were louder than the 3.4L to begin with?

Nutbeem

They are, but they're still too tame for my taste. Pump up the volume!

TT Gasman

Sounds like you might want to give GHL a call. They are not as loud as Fabspeeds, but there is no resonance.

TT Surgeon

agree, ghl

kem

I completely agree. There is no hint of resonance. Its the least resonating exhaust Ive heard on ANY car.

karlooz

resonance is soooo subjective. some think there is no resonance otheres, like me, think there is resonance. when you are lugging it in a higher gear there is slight to moderate resonance in the cabin. when the engine is on song, it goes away. going from PSE to fabspeed i DEFINITELY noticed the resonance but i have gotten used to it. i still say PSE is THE sound for a porsche. raspy and mean sounding but too bad it's heavy.

delirium

Is there any exhaust that is between a fab maxflo & fab exhaust bypass in terms of sound? Maxflo might be kinda tame, but the bypass may be too loud... I have never heard either in person tho...