What is this? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

wrrn73 · 07-25-2012, 04:57 PM

What are these and what purpose do they serve? Can they be removed with out problems?

strych9 · 07-25-2012, 05:57 PM

Those look like some sort of exhaust cutout valves. The springs would keep them open. The only way I would consider removal is if you can get all of the parts removed: valve, shaft, lever, and spring. Then you would have to weld the holes. Seems like a lot of work.

nytrorcr · 07-25-2012, 05:59 PM

Heat activated flaps in pipes, they restrict air flow and cause the motor and exhaust system to heat up faster, (in the old days) ha ha...... they had them just after the exhaust manifold

Joed · 07-25-2012, 06:49 PM

I think they were called heat risers.

TheNewCzar · 07-25-2012, 06:59 PM

They are only on the convertibles. I've heard these are spring valves to help lessen drone in the passenger area. Not sure if true or not but I kept them on when I did my exhaust.

wrrn73 · 07-25-2012, 07:21 PM

I did a little adjusting on them where they are always open and the car sounds better. Drove it down the road and no check engine light so I am going to leave it that way for a while. I am hoping to find more info at the Camaro5fest at Indy in Aug.

two_wheel_mayhem · 07-25-2012, 07:34 PM

Are they controlled by exhaust temperature?

07-25-2012, 04:57 PM	#1
wrrn73 Drives: 2012 Camaro 2SS/RS Coupe Join Date: Jul 2012 Location: Flat Rock, Illinois Posts: 23	What is this? What are these and what purpose do they serve? Can they be removed with out problems? Attached Images

07-25-2012, 05:57 PM	#2
strych9 I'll be back... Drives: Subaru, HD Road Glide Special Join Date: Apr 2012 Location: Omaha, NE Posts: 3,036 View My Garage	Those look like some sort of exhaust cutout valves. The springs would keep them open. The only way I would consider removal is if you can get all of the parts removed: valve, shaft, lever, and spring. Then you would have to weld the holes. Seems like a lot of work. __________________ Bye bye, Bumblebee! --------------------------------------------------------------------------------------- Build Journal My Garage GoPro Mic Hack

07-25-2012, 07:34 PM	#7
two_wheel_mayhem Would rather be riding Drives: No car no more Join Date: Jul 2009 Location: Indiana Posts: 2,750	Are they controlled by exhaust temperature? __________________ No dog in this fight anymore. 5th Gen owner 2009-2016.

07-25-2012, 05:59 PM	#3
nytrorcr Drives: I.P.C. 2SS vert, 21 wheels Join Date: Feb 2012 Location: Cookeville, TN but Just above Atlanta, GA for now Posts: 152	Heat activated flaps in pipes, they restrict air flow and cause the motor and exhaust system to heat up faster, (in the old days) ha ha...... they had them just after the exhaust manifold

07-25-2012, 06:49 PM	#4
Joed Drives: Camaro 2SS RS Victory Red Join Date: Mar 2012 Location: Hurley NY Posts: 52	I think they were called heat risers.

07-25-2012, 06:59 PM	#5
TheNewCzar Drives: 2011 SS Rally Yellow Vert, 2000 WS6 Join Date: Apr 2012 Location: Conway, AR Posts: 138	They are only on the convertibles. I've heard these are spring valves to help lessen drone in the passenger area. Not sure if true or not but I kept them on when I did my exhaust.

07-25-2012, 07:21 PM	#6
wrrn73 Drives: 2012 Camaro 2SS/RS Coupe Join Date: Jul 2012 Location: Flat Rock, Illinois Posts: 23	I did a little adjusting on them where they are always open and the car sounds better. Drove it down the road and no check engine light so I am going to leave it that way for a while. I am hoping to find more info at the Camaro5fest at Indy in Aug.