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aftermarket exhaust question

rcscoot25

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Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

Mine is 8 years older, but I've had a Corsa cat back on with AFM for 75k miles. Never bothered me a bit. Can hardly hear it. No drone either. You get what you pay for with exhausts, no question. Just the fact that I still have it after 8 MA winters tells the story.

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Silver ice 6.2 Senior Enthusiast

Silver ice 6.2

Posted
Posted

Mine is 8 years older, but I've had a Corsa cat back on with AFM for 75k miles. Never bothered me a bit. Can hardly hear it. No drone either. You get what you pay for with exhausts, no question. Just the fact that I still have it after 8 MA winters tells the story.

totally agree. Corsa is top notch and costs alot for a reason. Quality Quality Quality
Exhausted Enthusiast

Exhausted

Posted
Posted

I had an 18" magnaflow and flapper removed, left the rear resonator and it sounds like stock. You can barely hear a difference. Waste of money!!

So I sold it and bought a catback and turned off the v4 mode

bosro Enthusiast

bosro

Posted
Posted

Limited time with the Borla installed but I have not been bothered by truck going into V4 mode.

My 07 with an aftermarket exhaust sounded horrible when in V4.

Now if I get no drone on highway or towing I will be happy with the Borla system....

Jeff Williams New Member

Jeff Williams

Posted
Posted

rcscoot25 the V4 mode sounds horrible with the aftermarket exhaust I have. My wife has even commented telling me to get the V4 mode disabler.

Exhausted Enthusiast

Exhausted

Posted
Posted

totally agree. Corsa is top notch and costs alot for a reason. Quality Quality Quality

I agree on the quality but the sound is horrible IMO.

with LT's and ORY its even worse, sounds like a boat

robvas Enthusiast

robvas

Posted
Posted

I had an 18" magnaflow and flapper removed, left the rear resonator and it sounds like stock. You can barely hear a difference. Waste of money!!

So I sold it and bought a catback and turned off the v4 mode

It is still pretty quiet but it has a rumble that isn't there stock. And it's way louder at WOT

JeremyW426 Enthusiast

JeremyW426

Posted
Posted

I'll be going with the Borla system through GM myself, just because its designed to spec on that truck. That'll be a next summer project and any vids I've seen on it, it sounds great for what I'm looking for personally.

soltys Enthusiast

soltys

Posted
Posted

It is still pretty quiet but it has a rumble that isn't there stock. And it's way louder at WOT

 

My Magnaflow 22" is exactly what I was after. Subtle rumble at idle, barely notice it while normal/highway driving, but when you hit the go pedal - you know it's there.

 

What I like most about it is the clean sound. Not raspy like when you cut the exhaust off of a farm truck and go for a booze cruise.

rcscoot25 Enthusiast

rcscoot25

Posted
  • Author
Posted

Thank you all for your in put. Does anyone have or know where I can hear a exhaust in V4 mode.

chuckl1218 Senior Enthusiast

chuckl1218

Posted
Posted

 

Yes. it sounds bad. Dubbed the helicopter noise. It sounds like a misfiring engine. I had AFM tuned out of my truck so it never goes into V4 mode. Sounds way better at all speeds.

 

 

 

I think you're confusing drone with the V4 engine note. Drone is when one certain frequency of sound becomes shrill and hurts the ears. The V4 engine note just plain sounds bad. Not sure if the Borla kits have an internal flapper valve to mitigate that noise.

 

GM Borla cat back exhaust system (GM Performance system developed by GM and Borla, sold/ordered through GM) has the flapper external to the muffler and a piped bypass. None of the other Borla models have a flapper either internal or external.

bosro Enthusiast

bosro

Posted
Posted

Towed with the GM Borla system for first time yesterday.

No drone,not excessive noise at WOT.

V4 mode hardly noticeable.

I would not want any louder than this system....

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