slarson

My 91 Haibeck top end just dynod at 410 rwhp, I have a Borla Challenger system that is affecting performance. What yields better hp?
Cosra, B&B, or Flow master.

LowFlight

B&B maybe.

FU

On my LPE 385 the difference between the Borla Challenge (2 3/4) system and the B&B was more noise.

MUSHMEAT

How loud is the Billy Boat cat back vs stock? I am looking for a powerful sound.

90 Corvette ZR-1

it's a lot louder both in and out of the car

rickyrj1

I have the B&B and it sounds great.

locobob

Loud, but awesome!

The Corsa uses 2 1/2in pipe so if you are purely looking for more performance I would look elsewhere. Have you considered adding an X-pipe to the Borla setup? Might do the trick. From a pure HP standpoint I think B&B with X-pipe is at the top of the food chain, I believe it's the only 3in cat back currently available.

91vettezr1

b&b with x-pipe.a bit loud but sounds great.

SurfnSun

Corsas are fine til you get to stroker level. The Vette Doctors verified this, power was the same as B&B. I believe it was a 368 car.

TA

What the hell's peromance

Jeffvette

Still find that test to be I never heard back from Carmen on it either.

http://forums.corvetteforum.com/show...m_id=50&arch=1

LoTu5

I love the sound of the Corsas,its just a damn shame they couldnt make them in 3".

RatRacer

My 350 is making very good power with a set Corsa's.

slarson

My car is still at Haibecks, I'll ask him to try an X-pipe with the Borla.
Else, I'll go with B&B, How loud is your setup?

LoTu5

There is an owner in the UK making good power with a home modded 350 and running in the 11's with a set of corsas on his car.

I took off the Borlas and installed the corsas on my 350 91 last week and have found the exhaust note a whole lot better for my taste,plus i love the look of them,next is headers.



Here is a pic ive found before with the Borlas,I need to get rid of that fog lamp.

TommyL

The corsas look good to me and I like the sound but of the 4 tips only 2 are functional. I also like the look and sound of the 3" B&B however all 4 tips are functional.

I don't know how loud the B&B is inside the car but I think I will try the B&B when I am ready to remove the factory exhaust.

LoTu5

Yep i agree about the two tips only working for the corsas,shame the 4 tips dont work although ive heard of owners drilling them out?
I guess its a matter of personal choice when it comes to sound,i find the borlas and B&Bs have a deeper sound with some resonance,where as the corsas seem to be have a totally different sound altogether with no resonance.

RatRacer

The only thing that bothered me about the dummy tips on the Corsa is they stay clean while the functional tips blacken with carbon. I fixed this by masking off the dummy tip and spray painting the inside flat black. Works like a champ.

LoTu5

That bothered me too about the corsas,a great tip with the matt black,looks like another little job to be done

91redrocket

is that true for the '91 stock exhaust ? that there is only 2 functional tips ? because if you look the 2 inside tail pipes are blocked