Which is louder, Borla or Apexi WS for a GS300?

If I get the Turbo on my car, which exhaust will be louder?

 

If I had a turbo, I wouldn't get either one of them.

 

why not? and what would you subsequently recommend?

 

The WS is really quiet actually. Not sure on Borla.

 

I've used both Borla and WS. For turbo car, you need a more free flow exhaust system which means that muffler only just won't cut it. Now WS is not designed to run turbo application. It's great on NA vehicle because it still restricts the air, therefore you won't lose too much back pressure at low end.

If you look at the design on turbo or supercharged cars, you would see most of them use cannon type exhausts for maximal air flow but again, you lose more back pressure at low end. Losing low end is okay in this case since you have forced induction to compensate the lost.

So for forced induction, I'd recommend GReddy PE.

 

RA...thanks for the advise, that's what I wanted to hear. Is there any other exhaust out there that you recommend? My friend had a GReddy PE, the sound was great but it kept on scraping and his car only had Eibach spings on it. My car is a lot lower then 1.25", it's about 2.5" dropped. Will the Blitz NUR work?

 

also on turbo the low end that you would loose from bigger piping you will gain much more from a faster spool up time due to less restriction on the exhaust side of the turbo.

 

i have greddy with about 2" drop and if ur carefull.. u never scrape. I haven't scraped once since i lowered the car, only sometimes before it was lowered due to not realizing how low it really is.

 

I don't think Blitz has any cat-back in U.S. unless you get it from Japan. Blitz Nur-Spec R is not duel pipe that minds you. Yes, it's single pipe. It looks kind of ugly with stock rear bumper since there will be a hold with no pipe.

Once again, I would not recommend any muffler-only simply because we are looking for max gain. You've never seen those TT supra with muffler only, have you?

Unfortunately, there aren't many selection for cat-back in U.S. Even in Japan, most cat-back are single pipe.

AH. Why not TOM'S? I almost forgot about it.

 

yeah, the Tom's barrel exhaust is awesome. I have it on my car. Contact Steve Ganz for a good price.

you can see pics of it on my car

carhttps://www.clublexus.com/forums/showthread.php?s=&threadid=52854&highlight=finally+my+car+can+breath

aloha
ricky

 

If you like the Greddy PE and don't want the scraping , wait for the Greddy Evolution to come out . It's basically the PE with the tip on the muffler fixed to where it won't scrape.

No exact dates on its release for the GS though , so it might be a long wait . Go email and bug greddy about it , so they can hurry up.

 

I've heard ths GReddy Evo for so long. It's been in prototype phase for god know how many months. Good luck waiting for Evo.

 

This is half correct. The part about turbo is correct. You want to remove any restriction and flow velocity is of little concern. Now with NA restriction/backpressure is NOT good. You want to get it as free flowing as possible and remove all backpressure possible BUT you want to maintain velocity which larger piping or certain designs may impede. NA is much trickier IMO. When people talk about losing low end this is not a function of backpressure but rather a function of flow velocity. Take it from me who has had a million exhausts and even designed some on various cars.

 

I see. Thanks for correcting me.

So what is back pressure in the role of acceleration? Because I always thought losing back pressure = losing at low end.

 

Backpressure always impedes exhaust flow and thus acceleration. Now when you mean lose low end you are talking flow velocity which although correlates to some degree, also functions independently of backpressure (which relates to the total flow in CFM NOT velocity of the flow). So when people say you need backpressure to keep low end torque they are mistaken. Backpressure HURTS low end torque but what will also hurt it is losing too much velocity (more common). Exhaust is a tricky thing, not as simple as people would like you to believe.