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A. 16" o2 extension works with 97-05 Grand Prix(front)/Regal, 04-07 Cobalt/Redline, '00+ Monte Carlo/Impala/Bonneville.

FWIW, I left the O2 sensor as is. It took about 15 minutes of beating with a large ball peen to make the necessary clearance. It sucked, but it wasn't a HUGE deal. Woulda been 5 minutes if I had a lift.

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You were asking about the SLP powerflo. It actually sounds good. My brother has it on his 03 that is top swapped. It will drone with a downpipe.
 




Like i said... I am trying to make sure i choose the right borla mufflers since there are multiple models.. I know how to use youtube. But id much rather get feedback from guys with experience instead of basing my decision off of youtube videos.
 
You would rather listen to a opinion of somebody elses taste than listen for your own? Thats like having someone give you your first beer and them telling you " I promise you will love it, taste like gold" Only your ears can tell you what you like.
 
Seriously? Yeah i would rather hear opinions from experienced people that know these cars. This is my first GTP and im trying to do it right and learn what i can. So no need to tell me to just go to youtube. I was trying to make sure i had the right part..
 


When it comes to sound, I tend to agree.

Most people hear Beats headphones and think they've died and gone to heaven, meanwhile, I think I'm in hell.

Borla XS is the quieter model and the preferred unit IIRC.

I'd honestly suggest a Dynomax Super Turbo over the Borla though. Quieter while still maintaining flow.

As for the size, I can't help you there other than offset in and centre outlet is the factory setup IIRC. Been a while though.

Edit: Here's a video

Notice the camera still picks up the footsteps as the guy approaches the camera (implying it's quiet), yet still sounds nice and throaty when giving it some gas.

 
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