ZR-1 Net Registry Forums - View Single Post - Is a Borla Challenge Exhaust system desirable?

undercover · 03-01-2021

Thanks for the quick reply! Yes, I have the challenge setup with 2 3/4" piping. The muffler doesn't look like it necks down, though you can't see the transition between pipe and muffler because it's inside a curve. The resonator is a straight shot, and you can see the pinch from both inside and outside.

The GS80 won't be a freeway cruiser; I hope to get into vintage racing sometime as it's fully set up with cage, fire suppression, etc. The exhaust that's on it now is long tube headers into 3" pipes (with balance tube) into universal magnaflow mufflers. It has ugly tips, ugly welds, and is LOUD.

I'm looking to quiet it down some but not make it quiet. I hate drone but am fine tolerating a bit of drone on this car. I just don't want to attract too much attention driving it on the street.

My other thought was to put a 3" dual in/out xflow 5x8 center resonator like Magnaflow 12469/Jones MF2469 on the current setup just to tide me over and do a custom setup sometime in the future.

The GS80 originally came from Guldstrand's shop with Borla (and why I bought this system), but back in '92 when the car was done, choices were limited...

03-01-2021	#3
undercover Join Date: Sep 2010 Location: Seattle Posts: 19	Re: Is a Borla Challenge Exhaust system desirable? Thanks for the quick reply! Yes, I have the challenge setup with 2 3/4" piping. The muffler doesn't look like it necks down, though you can't see the transition between pipe and muffler because it's inside a curve. The resonator is a straight shot, and you can see the pinch from both inside and outside. The GS80 won't be a freeway cruiser; I hope to get into vintage racing sometime as it's fully set up with cage, fire suppression, etc. The exhaust that's on it now is long tube headers into 3" pipes (with balance tube) into universal magnaflow mufflers. It has ugly tips, ugly welds, and is LOUD. I'm looking to quiet it down some but not make it quiet. I hate drone but am fine tolerating a bit of drone on this car. I just don't want to attract too much attention driving it on the street. My other thought was to put a 3" dual in/out xflow 5x8 center resonator like Magnaflow 12469/Jones MF2469 on the current setup just to tide me over and do a custom setup sometime in the future. The GS80 originally came from Guldstrand's shop with Borla (and why I bought this system), but back in '92 when the car was done, choices were limited...